Leaf anatomy questions!?

Question

what chemicals are present in leaves that gives them their green color? and what are the role of these chemicals?

how might a thick cutin give an adaptive advantage to cacti?

how might no spongy layer give an adaptive advantage?

thank you!

Answer 1

The chemical present that gives leaves their colour is chlorophyll. The function of chlorophyll is to absorb sunlight energy and convert it to chemical energy whcih can be used by the plant in photosynthesis.

A thick cuticle prevents water being lost from the leaf by transpiration.