Plants and algae most recently shared a common ancestor 480 million years ago,and plants colonized land shortly after that.Light,water,minerals,and dissolved gases surround the whole body of a submerged green alga,and the buoyancy of water provides physical support.What part did plants evolve to absorb gases without drying out on dry land?
A) pollen
B) stomata
C) vascular tissues
D) cuticle
E) lignin
Correct Answer:
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Q7: In plants,
A) the diploid zygote develops into
Q14: What advantage do ferns have over bryophytes?
A)Ferns
Q15: What advantage do gymnosperms have over ferns?
A)Gymnosperms
Q16: Evidence that algae are the closest relatives
Q17: The parts of the plant that absorb
Q20: The parts of the plant that allow
Q21: As in animals,since plants have two haploid
Q23: The term "gymnosperm" literally means
A)"clothed ovule."
B)"naked seed."
C)"naked
Q24: A cotyledon is
A)the first leaf structure to
Q36: Gymnosperms are less successful than ferns because
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