Cell-mediated immunity is directed primarily microbes that survive in phagocytes and microbes that infect non-phagocytic cells. It is most effective in destroying virus-infected cells, intracellular bacteria, and cancers. It also plays a major role in delayed transplant rejection.
The answer is D, for when one tropic level is eaten by the tropic level above it, the tropic level is supporting the higher one. I. E. Rabbits are supported by the grass because rabbits eat the grass. Also, the grass population would be larger than rabbits, the rabbits larger than snakes, so on and so forth, so B is ruled out. B states that each population is larger than the one BEFORE it, but there is no way there would be more rabbits than grass. Also, there are both herbivores and carnivores in the food chain, so A and C are out. The best answer is D.
Answer:
The answer is C) 2
Explanation:
The rest of the arrows are pointing down in some way, while arrow 2 is pointing more up
Flooding can cause rivers to expand. when it does, it can get out of control and go to any urbanization near by. once it does it picks up any small items in the city. this can cause the river to get dirty, or polluted.
When people make dam's, a earth quake could happen, causing the dam to collapse and create a flood. If humans didn't build the dam, the flood would never happen.
Answer:
Cells make up tissues, tissues make up organs, and organs make up organ systems. For instance, digestive system organs cooperate to process food. The survival of the organism depends on the integrated activity of all the organ systems, often coordinated by the endocrine and nervous systems.
