The basic needs of all cells in the body is to have food, oxygen, and have their wastes taken away.
(see attached picture)
Answer - D. (The genetic code)
The genetic code is the nucleotide base sequence on DNA (with which information is encoded within genetic material). The nucleotide base sequence<span> codes for a sequence of amino acids, which are in turn used by living cells as the basic building blocks of proteins.</span>
Answer:
Physical
Explanation:
The skin is a physical barrier.
Mechanical barriers are made by mucous membranes
That would be B - Metabolism.
Answer:
To support the body and give it mobility, as well as protect organs
Explanation:
It provides something for the muscles to attach to, supports it, and protects vital organs