Do cơ thể chỉ gồm một tế bào nên hầu hết tế bào nhân sơ có kích thước lớn hơn tế bào nhân chuẩn

What would happen if the krill were removed from the food web

Amino acids contain the elements carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur. of the 20 amino acids found in humans, 11 are called "nonessential" because they can be manufactured by the body when needed. which elements in these 11 amino acids are commonly obtained from the metabolism of sugar molecules?

What is a dendrite and what does it do?