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Jul17-11, 06:54 PM
P: 205
Quote Quote by ryan_m_b View Post
Plants don't absorb green because the molecule they use to absorb EM radiation is chlorophyll, which is itself green. Potentially another molecule could be used but this is how life evolved and having a different pigment molecule may be hard to evolve because of the necessary huge morphological difference i.e. thermoregulation.

The problem is saying 'that is how life evolved' is not an answer because that does not explain how or why it evolved that way.

Eg saying giraffes have long necks because that is how they evolved is hardly a great answer.