A tropism is a growth response towards/away from a stimulus
As animals move around a lot, they do not display tropism. Instead they display other movement responses like kinesis
There are many different types of tropism including:
Tropisms can be towards (positive) or away from (negative) a stimulus
Tropisms however do not include
A plant grows based on tropisms, it does not consciously "choose" where to grow (as it has no brain or nervous system).
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A plant growing towards a window is a: |
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An animal growing is a result of: |
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A pumpkin grows it's tendrils around a tree. This is a result of: |
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A a radiata pine grows verticaly up. This is a result of: |
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A a root of a tree grows underground. This is a result of: |
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A germinating pea grows towards a hole in a box this is: |
More to come on the chemical basis of tropism...