Write A Creative Story in first person as if you are a pathogen being recognized and destroyed by the immune system of whatever organism you entered.

cramming before a final is bad because it makes a student's stress level higher. students who embrace cramming to get through a final exam week find themselves struggling to perform consistently, once the brain adjusts to prolonged sleep deprivation.

i think it is dna, i'm not totally sure but i think it might be.

the correct answer is:

a population changes in response to a change in the environment.

b. lithosphere, asthenosphere, mesosphere   is the answer most likely