The leg curl exercise focuses on three areas of your body: at the back of your thighs, the thing part nearest to your knee and the calves. The muscles involve in these areas are the hamstrings, quads and calf muscles, respectively.
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I would say the cell membrane since that is the only wall that the animal cell has.
The cuticle which covers crustacean bodies is composed of protein, chitin, and calcareous salt.
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Chemical digestion
Mechanical digestion can only break up the food particles into smaller pieces. A chemical digestion process called enzymatic hydrolysis can break the bonds holding the molecular 'building blocks' within the food together. For example, proteins are broken down into their 'building block' amino acids.
Explanation:
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Answer:
hereditary variat on selection is made of those genetic variats that well be passed on most effectively to the following generation