Function of an enzyme is to lower reaction's activation energy and to increase speed of a reaction, but to make it happen, enzyme and substrate must fit spatially. The shape of an enzyme is essential to make enzyme-substrate complex - if active site of an enzyme doesn't fit to substrate, there won't be a enzyme-catalised reaction.
Explanation:
Red and yellow bell........... - genetic diversity
A park has....... - species diversity
Five different bird..... - species diversity.
He ability of a stream to erode and transport materials is largely based on its velocity.
It explodes and disappears
