Why do most experts agree that the ancestors of land plants evolved in marine environments?
A) Roots would not have developed on land.
B) Differences in osmotic pressures between saltwater and freshwater could be overcome while plants were still in water.
C) There were no freshwater environments in the Paleozoic.
D) The first vascular plants are only found in marine environments.
E) Non-vascular plants require saltwater environments.
Correct Answer:
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Q24: The vast epeiric sea of the Middle
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Q26: At the end of the Paleozoic era,
Q27: The earliest fish were _.
A)ray-finned
B)boney-finned
C)cartilaginous
D)jawless
E)jawed
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Q30: The ancestors and early members of the
Q31: What does the name Placoderm mean?
A)plate-skinned
B)bony skin
C)scaly
Q32: The mass extinction at the end of
Q33: What is the correct order of trophic
Q34: _ reefs were dominated by crinoids, blastoids,
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