BSC 2011C Exam 2
hydrae, anemones, and jellyfish are in the phylum
Cnidaria
which of the following animals are not arachnids
barnacles
the kind of body symmetry created when only one axis divides the body into two halves is called
bilateral symmetry
Bivalves differ from gastropods in that:
bivalves are covered by a 2-sided shell connected by a hinge
You examine a 1-inch-tall plant in the woods. This plant is part of a mass of similar small plants covering an area of several square feet. It is very flexible and does not easily stand upright by itself. Upon examining the tiny, flat, leaf-like structures of this plant, you see no veins. There is no evidence of seeds, but at the end of a little stalk on the end of the plant, there is some sort of spore-bearing structure. This plant is probably a(n):
bryophyte
Which group of land plants is most restricted to moist environments?
bryophytes
which group of land plants is most restricted to moist environments
bryophytes
Water flow through a sponge takes the following pathway:
incurrent pores-->central cavity-->osculum
An example of antagonistic hormones controlling homeostasis is
insulin and glucagon in glucose metabolism
The space along a plant stem between adjacent branches (or leaves) is called:
internode
fruit production requires precious resources. what important benefit does fruit provide
is a mean of dispersal of seeds
coral bleaching
is caused by environmental stress such as changes in ocean temperature or pollution
Which of the following is FALSE about the Casparian strip?
it partially surrounds cells within the endodermis
A pollen grain is actually the
male gametophyte
a fruit is a
mature ovary
Meiosis in seed plants produces a ________, which eventually gives rise to an egg in an unfertilized seed.
megaspore
________ results in the production of spores in plants.
meiosis
Plant cells that are actively dividing are ___ cells
meristem
Plant cells that are actively dividing are ________ cells.
meristem
Sea anemones have no:
mesoderm
Which of the following undergoes meiosis during the development of pollen grains?
microspore mother cell
What type of cell activity occurs in the meristem regions of plants?
mitosis
You discover a plant that has unusual fruit around the seed and leaves with parallel veins. In which of the two major groups of flowering plants does it belong, and why?
monocots, because it has parallel veins
which evolutionary plant innovation eliminated the need for sperm to swim through water in order to fertilize an egg, resulting in plants being truly adapted for reproduction on land
pollen
in angiosperms, the male gametophyte is
pollen grain
what is the main difference between primary and secondary growth
primary growth increases the height of a plant, while secondary growth increases the girth ( width ) of the plant
Which of the following is NOT a characteristic of a gastropod?
reproduce asexually
Why do mosses and liverworts need to live in a moist environment?
reproduction
byrophytes absorb water through
rhizoids
Many root epidermal cells grow projections called ________, which extend from their surface and help in the absorption of water and minerals.
root hairs
The phylum Nematoda includes which of the following very common organisms, some of which are parasitic and most of which are often found in soil?
roundworms
____ are characterized by having a pseudocoelom
roundworms
which of the following organisms is not in phylum Mollusca
sea anemone
Embryonic plants wrapped up in nutritive tissue and a protective coat are called:
seeds
embryonic plants wrapped up in nutritive tissue and a protective coat are called
seeds
the non-cellular components in sponges that hold the cellular components together are called
spicules
The simplest multicellular animals that have only a few different cell types are:
sponges
Which of these groups is characterized by a lack of symmetry ( neither radical nor bilateral )
sponges
the only animals that lack tissues are
sponges
sporophyte produces
spores by meiosis
in an alternation of generations life cycle, what alternates
sporophytes and gametophytes
within the mollusks, only the cephalopods have a
closed circulatory system
Dermal tissue forms:
epidermis
which of the following weather conditions would you expect to have the greatest negative impact on the sexual reproduction of ferns and mosses
excessively dry for several days
a(n) ______ provides support and protection to arthropods
exoskeleton
In flowering plants, the unferfertilized ovule contains the:
female gametophyte
in flowering plants, the unfertilized ovule contains the
female gametophyte
if you were hiking and wanted to show off your understanding of the difference between gymnosperms and angiosperms, what characteristics could you see with your naked eye that would help you impress your friends
flowers or cones
Angiosperms with wind-dispersal pollen include:
grasses
which group of plants was the first to produce seeds
gymnosperms
Which of the following is FALSE about an exoskeleton?
has to be molted when the animal is growing
segmented worms differ from roundworms and flatworms in that they
have closed circulatory systems; are divided into many identical body segments ( A and C )
which of the following are seedless vascular plants with silica in the wall and tiny, scale-like leaved
horsetails
in Dicots, the shoot tip is protected by
hypocotyl hook
Echinoderms
include sea stars, sea urchins, and sea cucumbers
Which of these is an advantage to a plant that moved onto land?
increased sunlight availability
The function of the gills in bivalves is to:
A and B trap food and pass it to the mouth filter oxygen out of the water for breathing
Segmented worms differ from roundworms and flatworms in that they:
A and C have closed circulatory systems are divided into many identical body segments
A crayfish is a member of the phylum:
Arthropoda
A sea urchin is a member of the phylum:
Echinodermata.
Parasitic tapeworms are members of the phylum:
Platyhelminthes
parasitic tapeworms are members of the phylum
Platyhelminthes
Which of the following organisms is NOT in phylum Mollusca?
Sea Anemone
in vascular plants, sugar solutions are transported through tubes constructed of cells called
Sleve-tube elements
Spores and gametes are both haploid reproductive cells. What is the difference between them?
Unlike gametes, spores germinate and grow into a multicellular haploid gametophyte.
A multicellular organism whose cells lack cell walls and obtains energy by eating other organisms is a(n):
animal
a flowering plant produces pollen in the
anther
Flowers that make only pollen lack:
carpels
flowers that make only pollen lack
carpels
the American holly tree requires a " male" tree and a " female " tree to produce red berries in the winter. this indicates that the male flowers lack ____ and the female lacks _____
carpels, stamens
all of the following are major functions of roots except
carrying out photosynthesis
your job is to classify a newly discovered animal species. your initial studies reveal that your specimen has tissues but lacks organs; has no head, body cavity, or segmentation; and has radial symmetry. to what phylum does this animal belong
cnidaria
The ________ theory explains the movement of water and minerals through xylem.
cohesion-tension theory
The currents of water (containing food) that pass through a sponge are maintained by:
collar cells
All of the following are true of xylem except
companion cells provide nutrition for tracheids
All the following are TRUE of xylem EXCEPT:
companion cells provide nutrition for tracheids.
The gymnosperms that have needles are called:
conifers
A cnidarian that builds a calcium carbonate skeleton is a(n):
coral
the first leaves produced by an embryo while still inside the seed are
cotyledons
to limit water loss, land plants developed
cuticle
Which of the following are gymnosperms?
cycads, gingkos, and conifers
A ________ is an organism whose anus forms before its mouth during embryonic development.
deuterostome
Pollen and seeds evolved in response to:
dry land environments
In flowering plants, the unfertilized ovule contains the:
embryo
Which of the following statements is true? -millipedes are carnivorous insects -myriapods breathe using tracheae -air enters an insect through openings in its exoskeleton called tracheae -insects have 4 pairs of legs -arachnids have one pair of antennae attached to their heads
myriapods breathe using tracheae
Bacteria-containing nodules in the roots of legume plants aid in the fixation of:
nitrogen
bacteria-containing nodules in the roots of legume plants aid in the fixation of
nitrogen
which of the following characteristics helps differentiate between a monocot and a dicot
number of flower parts
Which of the following characteristics helps differentiate between a monocot and a dicot?
number of flowering parts
what type of tissue transports sugars ( the product of photosynthesis ) to the rest of the plant
phloem
which of the following is not a segmented worm
planarian
Both plants and green algae store food as:
starch
on which of the following structures does pollen land during pollination
stigma
The female reproductive structure, the carpel, consists of:
stigma, style and ovary
an opening in the epidermis of the leaf through which water evaporates is called a
stoma
in monocots, the shoot tip is protected by
the coleoptile
the male flower reproductive structure, the stamen, consist of
the filament and anther
The male flower reproductive structure, the stamen, consists of:
the filament and anther.
In cnidarians
the motile life stage is medusa
Which of the following statements is FALSE about flatworms?
they are in phylum Annelida
an arthropod embryo has ____ germ layer(s)
three
which of the following is not a crustacean
tick
An animal like a grasshopper has an elaborately branching system of tubes within its body that it uses for gas exchange. These tubes are called
tracheae
Water-conducting cells that are narrow and have small central cavities are called:
tracheids
the function of the gills in bivalves is to
trap food and press it to the mouth; filter oxygen out of the water for breathing ( A and B )
The fruit in the photo has evolved for dispersal by:
wind
a fertilized egg is a
zygote