Download BY 124 Worksheet 3 Which of the following adaptations is common

BY 124 Worksheet 3
1.
Which of the following adaptations is common to all seed plants?
a. pollen
b. ovules
c. reduced gametophytes
d. heterospory
e. All of the listed responses are
correct.
2.
Which one of the following is true of seed plants, but NOT true of seedless plants?
a. The sporophyte is dependent on the gametophyte.
b. The spore is the main means of dispersing the offspring.
c. A film of water is necessary for sperm to come in contact with eggs.
d. The sporophyte is large, and the gametophyte is small and independent.
e. The gametophyte is reduced and dependent on the sporophyte.
3.
The closest seedless relatives of seed plants produce one kind of spore that gives rise to
a bisexual gametophyte. What does this suggest about the ancestors of seed plants?
a. They were gymnosperms.
b. They were bryophytes.
c. They were homosporous.
d. They were heterosporous.
e. They produced separate male and female gametophytes.
4.
The eggs of seed plants are fertilized within ovules, and the ovules then develop into
__________.
a. fruit
b. ovaries
c. gametophytes
d. seeds
e. spores
5.
The cells within pollen grains are __________ and together comprise the __________.
a. diploid ... sperm nuclei
b. diploid ... a new sporophyte
c.
haploid ... male gametophyte
d. diploid ... spores
e. haploid ... spores
6.
Which example below is evidence provided by living gymnosperms of an evolutionary
transition between seedless and seed plants?
a. Gymnosperms only have one integument.
b. The sperm of gymnosperms do not require water or mobility for fertilization.
c. Some gymnosperms do not have reduced gametophytes.
d. The sperm of some gymnosperms have flagella.
e. In gymnosperms, two sperm are discharged into the pollen tube.
7.
Which of the following best states the advantages that seeds have over spores?
a. Seeds can survive even in conditions that are unfavorable for the parent plants.
b. Most seeds are poisonous; therefore, they are not consumed by animals and persist in the environment for
periods of time.
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c. Seeds contain embryonic plants, an abundant food supply, and a protective covering.
d. Seeds are single cells, demanding fewer nutrients from the parent plants.
e. Seeds can survive for extended periods of time at reduced metabolic rates.
8.
Which gymnosperm phylum is characterized by large cones and fern-like leaves and
thrived during the Mesozoic?
a. Cycadophyta
b. Ginkgophyta
c. Coniferophyta
d. Gnetophyta
e. Anthopyta
9.
Dietary supplements and decongestants containing ephedrine have recently become
more strongly regulated in the United States. Which phylum contains the plant from which
ephedrine is extracted?
a. phylum Cycadophyta
b. phylum Coniferophyta
c. phylum Gnetophyta
d. phylum Anthopyta
e. phylum Ginkgophyta
10. What global change occurring between the Carboniferous period and the Permian period
likely contributed to the success of the gymnosperms?
a. The breakup of Pangaea changed the flora and fauna of Earth dramatically.
b. The climate became drier and warmer.
c. Reptiles decreased in diversity and were replaced with amphibians better adapted for seed dispersal.
d. An asteroid hit Earth, leading to mass extinctions that made way for gymnosperms to take over lands
where other plants had perished.
e. Insects developed flight.
11. What is located in the scalelike structures packed densely in pollen cones?
a. developing seedlings
b. sporangia
c. sporophytes
d. megasporocytes
e. developing pollen tubes
12. Each pollen grain of a gymnosperm contains a __________.
a. microsporocyte
b. megasporocyte
c. ginkgophyte
d. fertilized ovule
e. male gametophyte
13. In ovulate cones, megasporocytes undergo __________ and produce __________
megaspores.
a. meiosis ... haploid
b. mitosis ... diploid
c. meiosis ... diploid
d. mitosis ... haploid
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e. Depending on environmental conditions, any of the listed responses may occur.
14. In a typical conifer, how long does it take for fertilization to occur after pollination?
a. It takes one year.
b. The processes are simultaneous.
c. It takes three years.
d. Pollination occurs after fertilization.
e. It takes one season.
15. The diploid generation of the plant life cycle always __________.
a. is called the gametophyte
b. produces gametes (eggs and sperm)
c. produces spores
d. develops from a spore
e. is larger and more conspicuous than the haploid stage
16. Which types of angiosperms would most likely be wind-pollinated rather than animalpollinated?
a. maize and wheat
b. oak and maple trees
c. roses and tiger lilies
d. The first and second responses are correct.
e. None of the listed responses is correct. Plants with flowers are not wind-pollinated.
17. Like gymnosperms, many grasses and angiosperm trees are wind-pollinated. To
conserve energy, these angiosperms do not produce complete flowers (complete flowers
have all four of the basic parts). Which part would be unnecessary for wind-pollinated
angiosperms?
a. anthers
b. petals
c. fruits
d. sepals
e. ovaries
18. The portion of a flower that receives the pollen is the __________.
a. ovary
b. style
c. filament
d. anther
e. stigma
19. During pollination, pollen grains are transferred from the __________ to the __________.
a. anther ... stigma
b. anther ... sepal
c. carpel ... stigma
d. ovary ... anther
e. stigma ... ovary
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20. A pea pod is formed from __________. A pea inside the pod is formed from __________.
a. endosperm ... an ovary
b. an anther ... an ovule
c. an ovule ... a carpel
d. an ovary ... a pollen grain
e. an ovary ... an ovule
21. After fertilization, the __________ develops into a seed and the __________ develops
into a fruit.
a. ovule ... ovary
b. egg ... ovule
c. pollen grain ... ovule
d. egg ... ovary
e. ovary ... ovule
22. Which of the following best describes the function of fruits?
a. reward for pollinators
b. food storage for the plant to use over the winter
c. to distract herbivores from eating the leaves
d. protection and dispersal of seeds
e. Depending on the plant species, any of the listed responses are possible.
23. A plant is said to be cross-pollinated if __________.
a. pollen grains are transferred from a different flower on the same plant
b. it is pollinated by insects
c. pollen grains are transferred to a flower on a different plant
d. its source of pollen is a different species of plant
e. it is pollinated by wind
24. The pollen tube releases two sperm cells into the embryo sac. The result of this is the
__________.
a. union of one sperm nucleus with the egg nucleus and the disintegration of the other sperm nucleus
b. union of one sperm nucleus with the egg nucleus and of the other sperm nucleus with two nuclei of
central cell, forming a triploid nucleus called the endosperm
c. union of the two sperm nuclei, forming a zygote
d. formation of a gametophyte
e. fusion of both sperm nuclei with the egg nucleus and the formation of a triploid zygote
25. Of the following, which is a difference in how reproduction occurs in gymnosperms
compared to angiosperms?
a. Only angiosperms have reduced gametophytes.
b. Only gymnosperms can contain male and female sporangia on the same plant.
c. Only angiosperm pollen grains form pollen tubes.
d. Double fertilization only occurs in gymnosperms.
e. Only the sperm of angiosperms combine with two central cell nuclei to form triploid endosperm.
26. The triploid nucleus of the embryo sac develops into the __________.
a. embryo
b. fruit
c. seed
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d. carpel
e. endosperm
27. In gymnosperms, the seed coat develops from the integument. In angiosperms, the seed
coat develops from the __________.
a. ovary wall
b. integuments
c. endosperm
d. female
gametophyte
e. receptacle
28. The vast majority of angiosperms with two cotyledons formerly classified as __________
are now classified as __________.
a. eudicots ... basal angiosperms
b.
c.
d.
e.
dicots ... eudicots
monocots ... dicots
eudicots ... dicots
monocots ... magnoliids
29. Which of the following lists of features characterizes eudicots?
a. scattered vascular bundles, netlike veins, floral parts in multiples of five
b. pollen grains with three openings, floral parts in multiples of three, netlike veins
c. two cotyledons, netlike veins, taproot usually present
d. one cotyledon, vascular bundles in rings, pollen grains with three openings
e. leaves with parallel veins, taproot usually present, vascular bundles arranged in rings
30. A bright pink flower with deep floral tubes will most likely be pollinated by which
mechanism?
a. bats
b. birds with long beaks
c. honeybees
d. wind
e. self-pollination
31. Six major crops˜wheat, rice, maize, potatoes, cassava, and sweet potatoes˜contribute
disproportionately to human diets. What percentage of all the calories consumed by
humans is supplied by these crops?
a. 80%
b. 30%
c. 65%
d. 90%
e. 50%
32. At current rates of deforestation, tropical rain forests will be eliminated in __________
years.
a. 1,000
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b.
c.
d.
e.
50
200
10
500
33. Besides the plant tissue that humans ingest, which angiosperm tissue is most directly
important for human survival?
a. xylem
b. bark
c. petals
d. cones
e. sepals
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