I think it is A. they can start to hear sounds at 20 weeks
Answer:
Active transporters or ion pumps are transporters that convert energy from various sources—including adenosine triphosphate (ATP), sunlight, and other redox reactions—to potential energy by pumping an ion up its concentration gradient.
Explanation:
Answer:
Electrons
Explanation:
Electrons are always outside the neucleus of an atom. The rest are stored inside.
