Answer:
idk
Explanation:
im very sorry about this but i dont know the answer
The answer is B. Genetic drift greatly affects small populations, but large populations can recover.
Answer:
Two ureters.
These narrow tubes carry urine from the kidneys to the bladder. Muscles in the ureter walls continually tighten and relax forcing urine downward, away from the kidneys. If urine backs up, or is allowed to stand still, a kidney infection can develop.
Explanation: