The answer is diffusion.
Facilitated diffusion is a process by which molecules are transported across the plasma membrane with the help of membrane proteins.
Answer:
The best description of the function of meiosis is that <em>it conserves chromosome number, produces haploid cells.</em>
The light reactions produce ATP and NADPH thet the Calvin cycle uses to convert CO2 into carbohydrate. The light reactions in the thylakoid membranes of the chloroplast, and the reactions of the Calvin cycle take place in the stroma
The answer is a simple radial nervous system.
Echinoderms do not have brains. Around their mouth, they have central rings from which nerves radially run into arms and along the body. Movement is controlled by the branches of those radial nerves.
