There are twenty amino acids in living organisms. Ten of these are referred to as essential amino acids. Why are they called essential amino acids?

Compare and contrast region e in the illustration above with region d. describe the physical characteristics of each region.

Which is the function of the hypothalamus in thermoregulation? answers: -sensor -effector -stimulus -intergrating center it's either a or c i believe

Which statement is the best summary of the model? a-a series of aerobic and anaerobic reactions take place in cells b- the sun's energy moves through trophic levels in a food chain c-light energy is converted into stored chemical energy plants. d- food molecules are broken down in the cells if living things.