Biology 1002 Final
Facelifts are a type of cosmetic surgery that are meant to tighten the skin to give the face a smoother, more youthful appearance. In addition to the skin, what else would you predict is also involved in this type of surgery? loose connective tissue bone simple cuboidal epithelium smooth muscle
loose connective tissue
Which structure can change to regulate the amount of CO2 entering the leaf? structure C lower epidermis xylem structure B
lower epidermis
Which statement best describes the current scientific view of birds? a group of flying mammals that are derived from monotremes, which also lay amniotic eggs a group of flying, endothermic reptiles that have lost teeth, the amniotic egg, and other heavy body features as an adaptation for flight a group of feathered, endothermic dinosaurs a group of feathered, ectothermic lizards that lack teeth
a group of feathered, endothermic dinosaurs
Craniates are chordates that all possess a head. a vertebral column. amniotic eggs. jaws.
a head.
Which of the following is most likely to be responsible if, when your blood sugar level rises, the level of sugar goes back down to a set point? -a homeostatic mechanism based on positive feedback -a malfunction in a homeostatic mechanism based on negative feedback -a homeostatic mechanism based on negative feedback -a malfunction in a homeostatic mechanism based on positive feedback
a homeostatic mechanism based on negative feedback
Which part of this figure shows the thorax segment of the lobster? The figure shows the diagram of a lobster. Its claws are labeled A, antennae are labeled B, head is labeled C, and a segment after the head is labeled D. structure A structure B structure C structure D
structure D
Which structures ensure that too much water does not leave the leaf? structures A and B structures B and C structures B and D structures D and A
structures D and A
Suppose you use a dissecting microscope to observe organisms that have colonized discs of densely packed, fibrous wood (Masonite plates) that have been submerged in 6 inches of lake water for 8 weeks. You see insect cases (protective shelters), insect larvae, and newly emerged insects with wings. You determine that you are looking at an insect species -that undergoes incomplete metamorphosis. -that undergoes complete metamorphosis. -with incomplete digestive tracts. -with a body plan of radial symmetry.
that undergoes complete metamorphosis.
You are looking at a sample of epithelial tissue under a microscope. What would you look for to determine the type of epithelium you are viewing? the shape of the cells the number of cell layers and the shape of the cells the number of cell layers the color of the cells
the number of cell layers and the shape of the cells
What is the node of a plant stem? the area between the shoots and the roots the point of apical dominance the point of leaf attachment a small pore where gases are exchanged
the point of leaf attachment
One predator avoidance mechanism that has evolved in prey is secretion of digestive enzymes that hydrolyze glucose. chemical defenses and bright coloration. development of a short gestation period. secretion of enzymes that break down toxic plant compounds.
chemical defenses and bright coloration.
The flow of ________ into ecosystems occurs in one direction only, while ________ are recycled within the ecosystem itself. minerals; energy compounds organic compounds; minerals energy; chemicals genetic information; genotypes
energy; chemicals
Which of the following is a major category of animal tissue? biceps heart epithelium lymph
epithelium
Which list accurately orders a food chain in the grasslands of Africa from low to high trophic levels? grass, giraffes, lions, vultures, fungi grass, fungi, lions, vultures, giraffes grass, lions, giraffes, fungi, vultures grass, fungi, giraffes, vultures, lions
grass, giraffes, lions, vultures, fungi
Currently, the single greatest threat to biodiversity is overexploitation of populations for food. habitat destruction due to humans. the introduction of exotic species. global warming.
habitat destruction due to humans.
Which clade is most directly related to lancelets? hagfishes ray-finned fishes lobe-fins lampreys
hagfishes
According to recent genetic research, the complexity of an organism: -has more to do with how genes are used or regulated than with which genes are present. -is inversely related to the number of protein-coding genes in its genome. -is directly correlated with the number of protein-coding genes in its genome.
has more to do with how genes are used or regulated than with which genes are present.
Many sponges, cnidarians, and echinoderms have few if any external characteristics distinguishing males from females. This seemingly odd structural characteristic is most likely associated with which of these functions? reproducing by spawning (simultaneous release of gametes into the water for fertilization) reproducing asexually only having a gastrovascular cavity that takes up most of the internal space. substrate feeding
having a gastrovascular cavity that takes up most of the internal space.
Most adult insects have three major body parts or sections. They are the antennae, head, and abdomen. legs, wings, and body. head, thorax, and abdomen. head, body, and legs.
head, thorax, and abdomen.
According to this figure, which organisms have the highest concentration of PCBs, and why? herring gulls, because they are at the bottom of the food chain smelt, because they are in the middle of the food chain phytoplankton, because they are at the bottom of the food chain herring gulls, because they are at the top of the food chain
herring gulls, because they are at the top of the food chain
Which statement is true? -A line of tetrapods gave rise to chordates, and a line of lobe-finned fishes gave rise to tetrapods. -Tetrapods and amphibians evolved at approximately the same time, while lobe-finned fishes evolved 2 million years later. -A line of lobe-finned fishes gave rise to tetrapods, and a line of tetrapods gave rise to modern amphibians. -A line of amphibians gave rise to tetrapods, and a line of lobe-finned fishes gave rise to modern amphibians.
A line of lobe-finned fishes gave rise to tetrapods, and a line of tetrapods gave rise to modern amphibians.
What is a disadvantage of cloning as a propagation technique? Cloning produces monocultures that can potentially be wiped out by a single disease. Cloned organisms are dangerous and unpredictable. Cloning is time-consuming, with slow results. Cloning is more expensive and more difficult than growing from seeds.
Cloning produces monocultures that can potentially be wiped out by a single disease.
Which process does not occur in ecosystems? Energy flows through the system. Producers convert light energy to chemical energy. Carbon is cycled between biotic and abiotic forms. Consumers directly use the energy source that powers the system.
Consumers directly use the energy source that powers the system.
What is the difference between the heartwood and sapwood of a tree? Heartwood contains xylem, and sapwood contains phloem. Heartwood no longer transports water and minerals, and sapwood still conducts xylem sap. Sapwood contains xylem, and heartwood contains phloem. Heartwood contains old phloem that no longer functions, and sapwood contains functioning phloem.
Heartwood no longer transports water and minerals, and sapwood still conducts xylem sap.
In Utah there is a clone of aspen trees that covers over 100 acres. Such clones can be considered to be a single plant with many stems. It appears that the first stem of this clone originated over 80,000 years ago, even before there were humans in North America. What likely contributes most to the long-term survival (long life span) of aspens? Sexual reproduction can occur more frequently in clones. All parts of the clone carry the same genes. A shared root system means that all stems receive the same nourishment. If parts of the organism (clone) are damaged, there are still other parts that can continue growing.
If parts of the organism (clone) are damaged, there are still other parts that can continue growing.
What is the best description of the trend for species survival from 1993 to 2016? It has decreased in all regions. It has increased only in developed regions. It has decreased only in developing regions. It has increased in all regions.
It has decreased in all regions.
Starfish do not appear to have bilateral symmetry and yet the diagram indicates they are bilaterians. What other characteristics do they have that would confirm that classification? a water vascular system and tube feet an internal skeleton and a complete digestive system a bilateral larva and an anus that forms from the first opening in the embryo external digestion and the ability to regenerate portions of its body
a bilateral larva and an anus that forms from the first opening in the embryo
The Kissimmee River Restoration Project is intended to: increase biodiversity of the region. provide areas for homes and businesses. restrict ecotourism and other recreational usage in the impacted region. drain natural wetlands in the central Florida region.
increase biodiversity of the region.
Removing the terminal bud of a plant that shows apical dominance will cause increased growth of the axillary buds. an increase in the growth of the root system. an immediate flowering of the plant. increased growth of the terminal bud.
increased growth of the axillary buds.
An organism that can fly and has an exoskeleton must be a(n) echinoderm. polychaete. insect. bird.
insect.
Non-native species that are introduced to new environments, spread far beyond the original point of introduction, and cause damage are called herbivores. pathogens. predators. invasive species.
invasive species.
Homeostasis -occurs when the external environment changes to match the internal environment -is the way the internal environment influences the external environment. -is the maintenance of a relatively constant internal state. -results from hormone imbalance.
is the maintenance of a relatively constant internal state.
Lampreys differ from fishes in that lampreys possess a backbone and skull. lack a backbone. lack an endoskeleton. lack jaws.
lack jaws.
The duck-billed platypus and other monotremes differ from other mammals in that they have hair. have mammary glands. lay eggs. are aquatic.
lay eggs.
Which substance, by providing strength, allows sclerenchyma cells to provide support and play a role analogous to that of an animal's skeleton? lignin sucrose chlorophyll starch
lignin
Which of the following correctly lists organisms from least complex in overall development to most complex? sponges, clams, hydras sponges, hydras, tunicates hydras, sponges, lobsters sponges, hydras, clams
sponges, hydras, clams
Which structure allows sufficient water to enter the leaf? structure A structure B structure C structure D
structure B
Rhizomes that end in enlarged structures that are specialized for storage are called runners. bulbs. taproots. tubers.
tubers.
Which animals are ectothermic? lizards and birds frogs and mammals birds and mammals turtles and lizards
turtles and lizards
Part complete When a crocodile eats a fish, the interspecific interaction between the two could be expressed as ________ for the crocodile and ________ for the fish. -; - +; + -; + +; -
+; -
The last common ancestor shared by humans and chimpanzees lived about 5-7 million years ago. 1.5-2.5 billion years ago. 25-40 million years ago. 6,000-8,000 years ago.
5-7 million years ago.
Complete the analogy: ________ are to vertebrate evolution as ________ are to plant evolution Amniotic eggs; seeds Opposable thumbs; hyphae Limbs; flowers Lungs; stomata
Amniotic eggs; seeds
Which of the following statements about an organ is false? An organ consists of many cells. An organ represents a higher level of structure than the tissues composing it. An organ consists of several tissues. An organ can only carry out the functions of its component tissues.
An organ can only carry out the functions of its component tissues.
You find a wormlike, soft-bodied adult animal in a mudflat. It is bilaterally symmetrical, is segmented, has a true coelom, and has a complete digestive tract. Based on these characteristics, what phylum does the animal represent? Annelida Cnidaria Nematoda Platyhelminthes
Annelida
While walking in your basement, you hear a crunching noise and notice that you have stepped on an organism. You look closely and see part of a segmented body and a few jointed appendages. What phylum does this animal represent? Arthropoda Echinodermata Annelida Chordata
Arthropoda
Hyperthyroidism treatment in cats usually involves antithyroid medication or the use of radioactive iodine to destroy the abnormal (overactive) tissue growing in the thyroid gland. Surgery to remove the abnormal tissue is generally not advised, as the surgery could also accidentally destroy parathyroid tissue. The parathyroid gland releases a hormone called PTH that increases blood calcium levels. Based on your knowledge of homeostasis, predict why surgery is ill-advised. A lack of PTH disrupts positive feedback control of blood calcium levels. Blood calcium levels would reach abnormally high levels if there is a lack of PTH. Positive feedback will not be able to compensate for any problems caused by negative feedback. Blood calcium levels would reach abnormally low levels if there is a lack of PTH.
Blood calcium levels would reach abnormally low levels if there is a lack of PTH.
________ are soil dwellers; ________ are mostly marine; and ________ mostly inhabit fresh water. Earthworms; leeches; polychaetes Earthworms; polychaetes; leeches Polychaetes; earthworms; leeches Earthworms; leeches; annelids
Earthworms; polychaetes; leeches
What are the consequences if decomposers are removed from the carbon cycle? The burning of wood and fossil fuels increases. Primary consumers are not able to consume as many producers. CO2 levels in the atmosphere increase. Fewer carbon compounds are broken down.
Fewer carbon compounds are broken down.
Rice is a staple crop across Asia; it serves as a main nutritional source for Asia's high population. In the 1970s, a pathogen called the grassy-stunt virus greatly decreased cultivated rice plant populations in Asia. Scientists found one wild relative of the rice plant in India that was resistant to the grassy-stunt virus, and today hybrid rice plants with that resistant gene are grown across Asia. To find this one rice plant species, approximately 17,000 rice plants samples were tested over the course of 4 years. If you were a scientist working on this project, how would you argue that the results of the research would be worth the time investment? Finding the wild relative with disease resistance would help deter invasive species of rice plants. Finding the wild relative with disease resistance would help avoid extirpation of fungus that has a mutualistic relationship with the cultivated rice plants. Finding the wild relative with disease resistance would protect the continent of Asia as a biodiversity hot spot. Finding the wild relative with disease resistance would allow Asian farmers to continue to grow the crop they know.
Finding the wild relative with disease resistance would allow Asian farmers to continue to grow the crop they know.
Suppose a fossil was found and identified to be a species approximately 3.5 million years old. This fossil could be a representative of which species? Australopithecus afarensis or Australopithecus africanus Australopithecus afarensis or Australopithecus anamensis Kenyanthropus platyops or Australopithecus afarensis Kenyanthropus platyops or Australopithecus africanus
Kenyanthropus platyops or Australopithecus afarensis
What do their results demonstrate about the interactions between the species that they studied? American toads are predators of lycosid spiders. American toads are herbivores of Japanese stiltgrass. Japanese stiltgrass is a pathogen of lycosid spiders. Lycosid spiders are predators of American toads.
Lycosid spiders are predators of American toads.
Complete the analogy: ________ are to plant evolution as ________ is/are to vertebrate evolution. Fungi; birds Angiosperms; fungi Mosses; Tiktaalik Ferns; insects
Mosses; Tiktaalik
The accompanying figure depicts natural fluctuation of ozone levels in Switzerland between 1925 and 1976. Dobson units are a way to measure the total amount of atmospheric ozone above a point on the Earth's surface. What can you conclude from this figure? Ozone levels show a distinct pattern of increasing by 10 Dobson units every 10 years. All small European countries will show fluctuations in ozone concentration levels. Natural fluctuation of ozone levels varies greatly year to year, so the average for this 50-year span was approximately 330 Dobson units. Switzerland can be used as a model example of how to maintain safe ozone levels.
Natural fluctuation of ozone levels varies greatly year to year, so the average for this 50-year span was approximately 330 Dobson units.
The most recent evidence clarifying the relationship between modern humans and Neanderthals comes from analysis of: -the types of tools that were made by Neanderthals. -Neanderthal mitochondrial DNA. -Neanderthal artwork and burial rites. -skeletal structure.
Neanderthal mitochondrial DNA.
Which statement is false? The shoot system of a plant consists of the stems, leaves, and adaptations for reproduction. Roots depend upon sugars produced in photosynthetic organs such as leaves. Plant root hairs help to absorb carbon dioxide from the soil. Stems and leaves depend on the water and minerals absorbed by the roots.
Plant root hairs help to absorb carbon dioxide from the soil.
If current trends in global warming continue for the next 50 years, where will the greatest effects of global warming likely be felt? Russia the Mississippi River the continental United States the Pacific Ocean
Russia
A biology student takes fish, algae, pond plants, invertebrates, and bottom sediment from a local pond and establishes them in an aquarium. When the system is stable, the student seals it into a large, airtight glass box and leaves the box in a sunny location. After 3 months, the organisms in the aquarium appear alive and healthy. Which statement about the experiment is true? No energy has entered or left the glass box during the 3 months. Some of the energy in the system has moved from one organism to another during the 3 months. During the 3 months, the biomass of animal life was greater than the biomass of plant life. The air in the glass box contains no carbon dioxide.
Some of the energy in the system has moved from one organism to another during the 3 months.
Which result is an observed effect of global warming on organisms? Corals "bleach" when decreased water temperatures cause them to expel their symbiotic algae. Some species of birds and frogs now begin their breeding seasons earlier in the year. Many butterfly populations have shifted their ranges toward the equator. Many polar bears produce more offspring as their hunting grounds increase in size.
Some species of birds and frogs now begin their breeding seasons earlier in the year.
If a male trembling aspen clone loses its ability to produce pollen, how is its reproduction capability affected? The clone will begin to produce pine cones with enlarged ovaries. The clone can continue to clone itself, but it will be unable to undergo sexual reproduction. The clone will have a greater opportunity of sexual reproduction with female trembling aspen trees. The clone will only be able to reproduce through fragmentation.
The clone can continue to clone itself, but it will be unable to undergo sexual reproduction.
If you generalize the trends in data to 20,000 years, what can you conclude? The oldest clones will show an increase in fertility. Younger clones will double their fertility. Fertility will no longer be a reasonable measurement of senescence. The oldest clone will likely experience senescence.
The oldest clone will likely experience senescence.
In an experiment to test the effect of a new weight loss drug, half of the people in the study received the drug, and the other half received a placebo (a pill that has no physiological effect). In addition, only males from the ages of 20 to 25 were selected to participate in the study. All participants received their treatments (drug or placebo) every day for 4 weeks. Which of the following components of the study design served as the control group? The 4-week length of the experiment. The participants who received a placebo. The participants who received the drug. The restriction of study participants in age and gender.
The participants who received a placebo.
How do sponges transport nutrients within their bodies? Their mobile amoebocytes transport food molecules from cell to cell. They rely on diffusion to move nutrients between their cells. They have simple digestive and circulatory systems composed of spongin. They are not able to transport nutrients within their bodies but must independently absorb all necessary nutrients from the surrounding water.
Their mobile amoebocytes transport food molecules from cell to cell.
Which statement is false? The layers of an onion are actually modified leaves. Stalks of celery are the petioles of the plant. A carrot is an example of a taproot. White potatoes are modified plant roots.
White potatoes are modified plant roots.
A key derived character of sharks and rays that distinguishes them from ray-finned fishes is a skeleton made of cartilage calcified (hard) bones. jaws and a swim bladder. vertebrae.
a skeleton made of cartilage
What is a characteristic of eudicots? vascular bundles scattered throughout the stem parallel leaf venation a flower with six petals a taproot system
a taproot system
Human DNA and chimpanzee DNA differ by more than 10%. about 1%. about 3%. the same amount that human DNA differs from orangutan DNA.
about 1%.
DDT and mercury deplete the ozone layer. accumulate in the tissues of organisms. contribute to acid precipitation. were once used as an energy source.
accumulate in the tissues of organisms.
Which adaptations allowed reptiles to complete their life cycles on land? four legs lungs ectothermic metabolism an amniotic egg
an amniotic egg
In your backyard you overturn a large rock. In the damp soil underneath the rock, you see various insects scurrying for cover: two black beetles, five black ants, two brown beetles, and three pillbugs. In this community of organisms, relative abundance favors ants. pillbugs. beetles. pillbugs and beetles equally.
ants.
Which animal group is characterized by the absence of tails? New World monkeys Old World monkeys apes lemurs
apes
Unlike both smooth and skeletal muscle, cardiac muscle has cells that are held in a loose matrix of fibers. are striated. are branched. contract.
are branched.
In general, plant dermal tissues are found throughout the plant body. near the center of the plant stems and roots. at the outer surface of a plant. lining the vascular tissue.
at the outer surface of a plant.
You are looking at a tissue under a microscope. You see mostly densely packed fibers with some cells scattered throughout. You would predict that the function of this tissue is to connect epithelia to underlying tissues. attach bones to muscles or other bones. produce voluntary movements of the body. conduct electrical impulses.
attach bones to muscles or other bones.
Rising concentrations of carbon dioxide (CO2) in the atmosphere result in the oceans containing less dissolved carbon dioxide. containing less dissolved oxygen. becoming more basic. becoming more acidic.
becoming more acidic.
Flatworms (Platyhelminthes) are ________ and typically have ________. bilaterally symmetrical; a complete digestive tract with a mouth and anus radially symmetrical; no digestive system bilaterally symmetrical; a gastrovascular cavity with one opening all parasites; no digestive system
bilaterally symmetrical; a gastrovascular cavity with one opening
Which of the following is formed from a matrix of collagen fibers embedded in a hard mineral substance? cartilage adipose tissue fibrous connective tissue bone
bone
Which species is an invasive species? pika in the western United States brown tree snake in Guam polar bear in Norway brown pelican off the coast of Louisiana
brown tree snake in Guam
Protecting the endangered black-footed ferret from extinction involved vaccinating the remaining population against sylvatic plague. collecting individuals from multiple small populations and combining them into a single large population. providing food during harsh winters. captive breeding and reintroduction.
captive breeding and reintroduction.
Caddisflies are insects that lay their eggs on the bottom of streams. The eggs mature into larvae, and eventually the larvae pupate, move to the surface of the stream, shed their pupal membranes, and emerge as winged adults. Caddisflies demonstrate incomplete metamorphosis. complete metamorphosis. alteration of generations.
complete metamorphosis.
The Yellowstone to Yukon Conservation Initiative is a plan to create a giant, fenced private land area between the national parks in the United States to create a protected zone for wildlife. connect all of the national parks in the United States. connect all of the national parks in the western United States. connect parks in the United States and Canada with protected corridors where wildlife can travel safely.
connect parks in the United States and Canada with protected corridors where wildlife can travel safely.
To decrease air pollution created from sulfur emissions, your local power plant wishes to build tall smokestacks. The ultimate consequence of this would most likely be biological magnification. a decrease in the pH of local lakes. dilution of sulfur pollutants in the atmosphere and thus reduction of their effects on the environment. creation of an environmental problem that is a distance from the power plant.
creation of an environmental problem that is a distance from the power plant.
Which layer of the skin lacks connective tissue? hypodermis epidermis hair dermis
dermis
Organisms that digest decaying organic material are decomposers. primary producers. detritivores. primary consumers.
detritivores.
Organisms with true radial symmetry -can be divided into two matching halves along only one plane. -do not have a distinct head region and tend to be sedentary or passive drifters. -tend to be highly mobile. -have their sense organs, mouth, and brain clustered in the head.
do not have a distinct head region and tend to be sedentary or passive drifters.
Which organism is a monotreme? zebra echidna whale kangaroo
echidna
Use the figure below to answer the questions that follow. Which group of animals is the most diverse? sponges deuterostomes eumetazoans bilaterians
eumetazoans
Some populations, especially those with high genetic variability and short life spans, may avoid extinction as the climate changes through evolutionary adaptation. biological magnification. bioprospecting. distribution of populations.
evolutionary adaptation.
The connection between structure and ________ is a basic concept of biology. species adaptation sex function
function
A physiologist is a biologist who studies the structure of body parts. physics of living things. function of body parts. evolution of animals.
function of body parts.
Which of these molluscs sometimes do not have an exterior shell? bivalves only gastropods only gastropods and cephalopods cephalopods only
gastropods and cephalopods
According to this figure, which two groups are most closely related? chimpanzees and gibbons Old World monkeys and humans tarsiers and gibbons gorillas and orangutans
gorillas and orangutans
Like many insects, some amphibians undergo ________ in their life cycle as they have distinct larval and adult stages. aquatic development followed by terrestrial existence metamorphosis alternation of generations development in a nest followed by flight
metamorphosis
You are a climate scientist who wants to investigate climate change. Which measurement would be the least useful? a long-term (30-year) study of coral biodiversity in the Australian reef ecosystem rainfall in the southeastern United States from 20 years ago to the present day changes in carbon dioxide (CO2) emission levels in China from 25 years ago to the present day methane (CH4) levels from dairy farms in Iowa during the years 2011 and 2012
methane (CH4) levels from dairy farms in Iowa during the years 2011 and 2012
Which of the following groups has a series of similar segments that make up most of the body? millipedes scorpions crustaceans insects
millipedes
Which structure is found in both plant and animal cells? cell wall surrounding the plasma membrane a large central vacuole containing fluid chloroplasts mitochondria
mitochondria
According to the "new" revised phylogeny based on genetic analyses, annelids are a member of the Lophotrochozoa and are most closely related to which of the following groups? molluscs arthropods echinoderms cnidarians
molluscs
Angiosperms consist of the clades cotyledons and roots. monocots and eudicots. gymnosperms and angiosperms. cycads and mosses.
monocots and eudicots.
Which type of tissue forms a communication and coordination system within the body? muscle epithelial connective nervous
nervous
The structural and functional unit of nervous tissue is the axon. dendrite. neuron. nerve.
neuron.
How many layers of vascular cambium will there be in the trunk of a 10-year-old tree? ten two one thousands
one
Flowers bear seeds that develop from ovules housed in protective chambers called pistils. sepals. stamens. ovaries.
ovaries
The freshwater leech is an organism that feeds off of the blood of other organisms such as frogs and turtles. Which interaction describes the relationship between freshwater leeches and frogs or turtles? mutualism herbivory parasitism predation
parasitism
Most trees and shrubs continue to grow year after year. Such plants are known as biennials. annuals. perennials.
perennials.
Sieve-tube elements are food-conducting plant cells that are part of the phloem. xylem. sclereids. tracheids.
phloem.
The liquid part of human blood that consists of water, salts, and dissolved proteins is known as plasma. interstitial fluid. lymph. platelets.
plasma.
One simple thing that you can do to help safeguard the environment is to eat a diet consisting only of primary consumers. a mix of producers and consumers. producers. secondary consumers.
producers.
Sustainable development will: require making difficult decisions regarding travel to other planets. require global, multinational cooperation. require many people to contribute financially. speed up evolution.
require global, multinational cooperation.
This image represents monocots and eudicots. Which labeled row shows traits that are correctly categorized? row A−−all monocots row B−−all dicots row A−−all eudicots
row A−−all monocots
Which of the following are not included among the eumetazoans that have true tissues? sea anemones (Cnidaria) sponges (Porifera) sea stars (Echinodermata) earthworms (Annelida)
sponges (Porifera)
Bioengineering to create organs for transplants involves transplanting unaltered organs. using 3D printers to make organs that function without copying structure. growing cells without a scaffold. seeding a scaffold of connective tissue matrix with stem cells.
seeding a scaffold of connective tissue matrix with stem cells.
The key derived character of the lobe-finned fish is the -series of rod-shaped bones in their pectoral and pelvic fins. -lateral line system. -flattened scales covering their skin. -operculum.
series of rod-shaped bones in their pectoral and pelvic fins.
Imagine an invertebrate that lives in an estuary where salinity varies cyclically with the tides. If this individual is able to adjust the salt concentration of its body fluids, its salt concentration will have -a cyclic fluctuation opposite that of the surrounding water. -irregular fluctuations that range from large to small. -a cyclic fluctuation depending upon when the animal drinks. -slight fluctuations that are kept within a narrow range.
slight fluctuations that are kept within a narrow range.
Suppose that the bottom of an ocean floor is disrupted, and bits of algae along with other bottom-dwelling microorganisms are scattered about into the ocean water. Which organism would be able to take the best advantage of this temporary food source? cnidarians sponges parasitic flatworms soil-dwelling nematodes
sponges
How many chromosomes are there in an unfertilized maize (corn) egg cell nucleus as compared to a maize (corn) pollen cell nucleus? twice as many half as many the same number
the same number
Which part of the body is likely to be much more diverse in mammals compared to that in other groups? the jawbone the structure of the limbs the structure of the vertebrae the teeth
the teeth
One way in which distributions of populations and species have been responding to climate change is by shifting toward the equator. toward the poles. to lower elevations.
toward the poles.
Most biodiversity hot spots are found in ________ regions. western tropical temperate tundra
tropical
Which type of vascular tissue cell in a plant is dead at maturity? sieve-tube cells vessel elements parenchyma cells companion cells
vessel elements