Practice question · Select all that apply
Which problems did organisms have to solve in order to live on land?
Hints
- Three are genuine problems land created; one gets the comparison backwards.
- Light is far more available on land than underwater, where it attenuates rapidly.
Show the answer
- A. Preventing water loss from the body surface
- C. Reproducing without standing water to carry gametes
- D. Supporting the body without buoyancy
Why
Desiccation, support and reproduction were all real obstacles. Light was an advantage of land, not a problem, water absorbs light rapidly with depth, which is why the photic zone is so shallow.
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