Which of the following best defines gene flow?

1.the sum of all genetic
traits in a population's individuals at any given time

2.any movement of genes from one population to another

3.any movement of organisms from one environment to another

4.the random change in the frequency of an allele in a population.

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.

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.

i think the answer would be d

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.