QUESTION 20
A botanist discovers a new species of plant in a tropical rain forest. After observing its anatomy and life cycle, he notes the following characteristics: flagellated sperm, xylem with tracheids, separate gametophyte and sporophyte generations with the sporophyte dominant, and no seeds. This plant is probably most closely related to _____.
pine trees
ferns
mosses
flowering plants
QUESTION 20
A botanist discovers a new species of plant in a tropical rain forest. After observing its anatomy and life cycle, he notes the following characteristics: flagellated sperm, xylem with tracheids, separate gametophyte and sporophyte generations with the sporophyte dominant, and no seeds. This plant is probably most closely related to _____.
| pine trees | ||
| ferns | ||
| mosses | ||
| flowering plants |
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Related questions
Question 1
The key innovation that allowed for plant survival on land, seenin the first land plants and all others after, but not in thecharophytes, is
Question 1 options:
fruit. | |
vascular tissue. | |
the seed. | |
protection of the embryo. |
Question 2
Which dramatic change in the alternation-of-generations lifecycle led to the protection of all phases of the life cycle and theformation of seeds?
Question 2 options:
transition from a dominant gametophyte generation to a dominantsporophyte generation | |
transition from a dominant sporophyte generation to a dominantgametophyte generation |
Question 3
Which structure(s) allow the sporophyte of vascular plants to beprotected against drying out?
Question 3 options:
the waxy covering of leaves, called the cuticle | |
small openings in the leaves, called stomata | |
guard cells that surround each stoma | |
all of these structures protect the dominant sporophyte fromdrying out |
Question 4
Why are the bryophytes called nonvascular plants?
Question 4 options:
because they are specialized for transporting water and organicnutrients | |
because their roots, stems, and leaves lack vascular tissue | |
because they protect their embryo | |
because they produce wind-blown spores |
Question 5
Which generation is dominant in the bryophytes?
Question 5 options:
the generations are equally dominant | |
the sporophyte | |
the gametophyte | |
there is no sporophyte generation in bryophytes |
Question 6
Which of the bryophytes are typically low-lying, due mostly totheir need for moisture and lack of vascular tissue?
Question 6 options:
the mosses | |
the liverworts | |
the hornworts | |
all of the bryophytes are low-lying |
Question 7
Which structure of the moss protects the embryo from dryingout?
Question 7 options:
the archegonium | |
the antheridium | |
the sporangium | |
the stalk |
Question 8
Cooksonia were the first __________ plants; they hadwind-blown spores, __________, leaves, and roots.
Question 8 options:
nonvascular; branches | |
vascular; seeds | |
nonvascular; seeds | |
vascular; branches |
Question 9
The roots of today's lycophytes are much like __________ were inearly vascular plants; the vascular tissue is __________.
Question 9 options:
roots; centrally placed | |
stems; centrally placed | |
leaves; only found at the perimeter | |
branches; only found at the perimeter |
Question 10
Pteridophytes, or ferns and their allies, are __________vascular plants with __________.
Question 10 options:
seed-producing; microphylls | |
seedless; microphylls | |
seedless; megaphylls | |
seed-producing; megaphylls |
Question 11
Microphylls __________. Megaphylls__________.
Question 11 options:
are found in all vascular plants; are only found in thelycophytes | |
are broad leaves with a single strand of vascular tissue; arenarrow and have several strands vascular tissue | |
are broad leaves with several strands of vascular tissue; arenarrow and have a single strand of vascular tissue | |
are narrow and have a single strand of vascular tissue; arebroad leaves with several strands of vascular tissue |
Question 12
The fern life cycle
Question 12 options:
all of these choices accurately describe the fern lifecycle. | |
is dependent on external water. | |
relies on the wind to disperse the spores. | |
produces a gametophyte that lacks vascular tissue. |
Question 13
Seed plants use meiosis to produce
Question 13 options:
spores and pollen. | |
seeds and fruit. | |
pollen and seeds. | |
microspores and megaspores. |
Question 14
In seed plants, a microspore develops into
Question 14 options:
an egg. | |
a pollen grain. | |
a sporophyte. | |
All of these answers correctly complete this sentence. |
Question 15
Within the angiosperms, or ___________, two groups exist. Theyare named for their __________.
Question 15 options:
vascular plants; number of cotyledons, or seed coats | |
nonvascular plants; leaf type | |
flowering plants; number of cotyledons, or seed coats | |
fungi; leaf type |
Question 16
The __________ parts of a flower are the stamens, each of whichhas two parts: the anther and the filament. The __________ parts ofa flower are the carpel, which has three major regions: the stigma,the style, and the __________.
Question 16 options:
female; male; ovary | |
male; female; sepals | |
female; male; sepals | |
male; female; ovary |
Question 17
Double fertilization during the angiosperm life cycle involvestwo sperm, one of which __________, while the other __________.
Question 17 options:
fertilizes the egg to form a zygote; produces the endospermnucleus, which will develop into food for the developing plant | |
is a mature male gametophyte; is an immature malegametophyte | |
lands on the carpel of the plant; is usually blown away in thewind | |
develops into the seed; develops into the fruit that surroundsthe seeds |
Question 18
The bodies of most fungi are made up of a network of filamentscalled hyphae.
Question 18 options:
True | |
False |
Question 19
What is the difference between land fungi and the chytrids?
Question 19 options:
Land fungi are motile and have flagella at all stages of theirlife cycle. The chytrids do not have flagella. | |
Land fungi are nonmotile and do not have flagella at any stageof their life cycle. The chytrids have flagellated spores andgametes. | |
Land fungi are nonmotile and only have flagellated spores. Thechytrids have flagellated spores and gametes. | |
Both are motile for part of their life cycle. Land fungi aremotile as gametes. Chytrids are motile as spores. |
Question 20
The vast majority of described species of fungi are __________fungi, which include unicellular __________, which reproducesexually once their food supply runs out. When yeast ferment, theyproduce ethanol and carbon dioxide.
Question 20 options:
zygospore; black bread molds | |
club; mushroom | |
sac; yeast | |
mutualistic; lichen |
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