Answer:
A
Explanation:
a theory is usually supported by evidence or another laws rules. it must have pretty strong evidence, but it can NOT become a law. a law is set in stone, and proved by math.
Circulatory system and nucleus
Answer:
proteins; purify; expression
Explanation:
One of the products of recombinant DNA technology is antibiotics. To have penicillin, we used to have to breed fungus that produces the drugs. With recombinant DNA technology, you can extract the DNA that needed to produce penicillin, then put it into a bacteria using an expression vector. This technology will allow us to produce a specific protein (whether its enzyme, hormone, or anything) easier.
The small intestine has cilia to absorb nutrients and reabsorb water
I think its pulmonary circulation too.
