Bio II Exam 3 practice test

29) Once labor begins in childbirth, contractions increase in intensity and frequency, causing more contractions to occur until delivery. The increasing labor contractions of childbirth are an example of which type of regulation? A) positive feedback B) negative feedback C) feedback inhibition D) enzymatic catalysis

A

At which stage of a basidiomycete's life cycle would reproduction be halted if an enzyme that prevented the fusion of hyphae was introduced? A- Plasmogamy B-Germination C-Karyogamy D- Fertilization

A

If all fungi in an environment that perform decomposition were to suddenly die, then which group of organisms benefit most, due to the fact that their fungal competitors have been removed? A-Prokaryotes B-Flowering plants C-Grasses D-animals

A

Insects breath using tunnels that connect from the surface to the inside of the body. This system depends upon passive diffusion of oxygen and therefore constrains the ________ of insect bodies A-Size B-Shape C-Durability D-Longetivity

A

Most cnidarians are known to produce toxins. In fact, it has been claimed that one particular species produces the most deadly of all toxins on the planet. What feature of this group most likely evolved simultaneously with the evolution of these toxins? A- A slow-moving or sessile lifestyle in the adult B- The medusa body form C-Asexual reproduction D-Diploblastic design

A

On a per cell basis whose metabolic rate is higher? A- Metabolic rate of a mammal B- Metabolic rate of a reptile

A

Plasmogamy can directly result in which of the following? A-Heterokaryotic cells B-Cells with a single haploid nucleus C-Cells lacking nuclei D-Cell with two diploid nuclei

A

The presence of a lophophore in a newly discovered species would suggest that the species: A- Is a suspension (filter) feeder B-Has an exoskeleton C-Grows by shedding its external covering D-Is motile

A

Which of the following would you classify as something other than an animal? A-Choanoglagellates B-Jellyfish C-Sponges D-Coral

A

Compared with a smaller cell, a larger cell of the same shape has _____. A) less surface area B) less surface area per unit of volume C) a smaller average distance between its mitochondria and the external source of oxygen D) a smaller cytoplasm-to-nucleus ratio

B

In an examining an unknown animal species during its embryonic development, how can you be sure what you are looking at is a protostome and not a deuterostome? A-There is evidence of cephalization B-You see a mouth, but not an anus C- The animal is triploblastic D-The animal is clearly bilaterally symmetrical

B

Lymph nodes are areas where concentrated white blood cells help to filter foreign particles from the body's interstitial fluid. The lymphatic system has the most interaction with the: A-Nervous system B-Immune system C- Muscular system

B

Much of the coordination of vertebrate body functions via chemical signals is accomplished by the _____. A) respiratory system B) endocrine system C) integumentary system D) excretory system

B

The last common ancestor of all animals was probably a: A-Adults are radially symmetrical B-The pore (blastopore) formed during gastrulation becomes the anus C-Embryos have pharyngeal pouches that may or may not form gill slits D-All have a spinal column

B

Which event likely involves a positive feedback loop? A-Sleeping B-Vomiting C-Rising BP D-Sweating

B

Which of the following is (are) unique to animals? A-flagellated gametes B-Nervous system signal conduction and muscular movement C-Heterotrophy D-The structural carbohydrate,chitin

B

You find what you believe is a new species of animal. Which of the following characteristics would enable you to argue that it is more closely related to a flatworm (platyhelminthes) than it is to a earthworm (annelid)? A-Is is a suspension feeder B-It has a mouth and an anus C-Excurrent siphon D-Visceral mass

B

An elementary school science teacher decided to liven up the classroom with a saltwater aquarium. Knowing that saltwater aquaria can be quite a hassle, the teacher proceeded stepwise. First, the teacher conditioned the water. Next, the teacher decided to stock the tank with various marine invertebrates, including a polychaete (annelid), a sponge, several bivalves, a shrimp, several sea anemones of different types, a colonial hydra, a few coral species,, a sea star, (echinoderm) and several herbivorous gastropods. Lastly, she added some vertebrates—a parrotfish and a clownfish. She arranged for daily feedings of copepods and feeder fish. One day, Tommy, a student in an undersupervised class of forty fifth graders, got the urge to pet Nemo (the clownfish), who was swimming among the waving petals of a pretty underwater "flower" that had a big hole in the midst of the petals. Tommy giggled upon finding that these petals felt sticky. A few hours later, Tommy was in the nurse's office with nausea and cramps. Microscopic examination of his fingers would probably have revealed the presence of _____. A-Teeth marks B-Spicules C-Nematocysts D-Spines

C

Both animals and fungi are heterotrophic. What distinguishes animal heterotrophy from fungal heterotrophy is that most animals derive their nutrition by: A-Consuming living, rather than dead, prey B-Using enzymes to digest their food C-Ingesting it D-Preying on animals

C

Some fungal species can kill herbivores while feeding off of sugars from its plant host. What type of relationship does this fungus have with its host? A-Parasitic B-Commensal C-Mutualistic D-Predatory

C

The mucosa of the stomach is lined with gastric pits, and is a form of A- Muscle tissue B- Connective tissue C-Epithelial tissue D- Nervous tissue

C

The thin horizontal arrows in the figure above show that the _____. A) warmer arterial blood can bypass the legs as needed, when the legs are too cold to function well B) warmer venous blood transfers heat to the cooler arterial blood C) warmer arterial blood transfers heat to the cooler venous blood D) arterial blood is always cooler in the abdomen, compared to the temperature of the venous blood in the feet of the goose

C

Why are mycorrhizal fungi superior to plants at acquiring mineral nutrition from the soil? A- Mycelia are able to grow in the direction of food B-Hyphae are one hundred to one thousand times larger than plant roots C-Fungi secrete extracellular enzymes that can break down large molecules D-Hyphae have a smaller surface-area than do plant roots

C

You observe the gametes of a fungal sfpecies under the microscope and realize that they resemble animal sperm. To which of the following group does the fungus belong? A- Basidiomycota B-Zygomycetes C-Chytrids D-Ascomycota

C

11) Most of the exchange surfaces of multicellular animals are lined with _____. A) connective tissue B) smooth muscle cells C) neural tissue D) epithelial tissue

D

18) The type of muscle tissue surrounding the intestines and blood vessels is _____. A) skeletal muscle B) cardiac muscle C) intercalated cells D) smooth muscle

D

8) All animals, whether large or small, have _____. A) an external body surface that is dry B) a basic body plan that resembles a two-layered sac C) a body surface covered with hair to keep them warm D) most of their cells in contact with an aqueous medium

D

An elementary school science teacher decided to liven up the classroom with a saltwater aquarium. Knowing that saltwater aquaria can be quite a hassle, the teacher proceeded stepwise. First, the teacher conditioned the water. Next, the teacher decided to stock the tank with various marine invertebrates, including a polychaete (annelid), a sponge, several bivalves, a shrimp, several sea anemones of different types, a colonial hydra, a few coral species,, a sea star, (echinoderm) and several herbivorous gastropods. Lastly, she added some vertebrates—a parrotfish and a clownfish. She arranged for daily feedings of copepods and feeder fish. The teacher and class were especially saddened when the colonial hydrozoan died. They had watched it carefully, and the unfortunate creature never even got to produce offspring by budding. Yet, everyone was elated when one of the students noticed a small colonial hydrozoan growing in a part of the tank far from the location of the original colony. The teacher was apparently unaware that these hydrozoans exhibit _____. A-Teleportation B-Spontaneous generation C-Alternation of generations D-A medusa stage

D

Arrange the following in order from largest to smallest 1-Ascospore 2-Ascocarp 3-Ascomycete 4-Ascus A-2->4->1->3 B-2->3->4->1 C-3->4->1->2 D-3->2->4->1

D

Connective tissues typically have _____. A) little space between the membranes of adjacent cells B) the ability to transmit electrochemical impulses C) the ability to shorten upon stimulation D) relatively few cells and a large amount of extracellular matrix

D

Sponges: A- have a central nervous system B-Are the simplest diploblastic animals C- Have feeding cells called dinoflagellates D-Have larvae which are motile

D

The protostome developmental sequence arose just one in evolutionary history, resulting in two main subgroups- Lophotrochozoa and Ecdysozoa. What does this finding suggest? A-The lophotrochozoans are monophyletic B- The protostomes are a polyphyletic group C-These two subgroups have a common ancestor that was a deuterostome

D

What tissue type surrounds the outside of the stomach? A-Nervous B-Epithelial C-Muscle D-Connective

D

When a mycelium infiltrates an unexploited source of dead organic matter, what are most likely to appear within the food source soon thereafter? A-increased oxygen levels B-Fungal haustoria C-Larger bacterial populations D-Fungal enzymes

D

As the size of some animals has evolved to greater sizes, the effectiveness of their adaptations that promote exchanges with the environment have also increased. For example, in many larger organisms, evolution has favored lungs and a digestive tract with _____. A) more branching or folds B) increased thickness C) larger cells D) decreased blood supply

a