Answer: the beaks of the finches are adapted to the way the bird usually gets food. :) good luck!
Tough cuticle made of proteins and chitin.
Vessel walls are very thin because they let ease of transfer of molecules to these tissues. This is why <span>capillaries and not arteries or veins are found in alveolar, nephrons, and villi.</span>
The correct option is D !
as steroids are always lipids in nature and enzymes are always proteins !and going deeper protein are made from Amino acid so ...
answer is D !
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