Choose of the following best describe tropism. A: Tropism is the only cause for plant growth.
B: True tropism requires plants to grow.
C: Tropism causes plants to produce tropism.
D: Tropism will cause plants to react to both internal and external stimuli.

B) True tropism requires plants to grow.

Explanation:

I got 100% with this answer!

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in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".