How do nastic movements differ from tropisms?  

A.  Nastic movements are slower than tropisms.
B.  Nastic movements only occur in the dark.
C.  Tropisms are directional responses to directional stimuli; nastic movements are the same regardless of the direction of the stimulus.
D.  Nastic movements happen after a stimulus, tropisms happen during a stimulus.
E.  Nastic movements are not reversible.


C.  Tropisms are directional responses to directional stimuli; nastic movements are the same regardless of the direction of the stimulus.

Biology & Microbiology

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