Probably because of history relation.
Answer: A. 50%
Explanation: If you create a Punnett Square and cross the 2 genotypes, out of the 4 possibilities, 2 will be CC and 2 will be Cc.
Skin cells are made of proteins, water, and fat. But brain cells are only made up of amino acids, which ca make protein.<span />
answer: The raw materials are water, carbon dioxide, oxygen, glucose, and energy.
