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 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
Answer: B. stomata
Biology & Microbiology
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A. Environmental Protection Agency B. The National Institutes of Health C. Centers for Disease Control and Prevention D. Food and Drug Administration
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