Multiple Choice
Why have biologists hypothesized that the first land plants had a low,sprawling growth habit?
A) At the time of the first land plants,the carbon dioxide,which is necessary for photosynthesis,was primarily located close to the ground.
B) They were tied to the water for reproduction and thus needed to remain in close contact with the moist soil.
C) The ancestors of land plants,green algae,lack the structural support to stand erect in air.
D) Land animals of that period were small so they needed short plants to eat.
E) There was less competition for space;only once land plants spread out did they start to grow upright.
Correct Answer:
Verified
Correct Answer:
Verified
Q18: What evidence do paleobotanists look for that
Q39: In general,liverworts have a cuticle and pores.However,some
Q40: Where are you least likely to see
Q41: An important fossil fuel is coal,much of
Q42: What two major novelties allowed for the
Q43: The closest relatives of the familiar pine
Q44: Use the following information when answering the
Q46: Which of the following lines of evidence
Q49: Most moss gametophytes do not have a
Q52: The vast number and variety of flower