Question

Question 18 of 20:

Select the best answer for the question.
18. Which of the following is true of red blood cells?
O A. Once created in bone marrow, they circulate for our lifetime
O B. They live for only 120 days
O C. They have multiple nuclei
O D. They live for only about 20 days

Answer 1

The answer is B.

Red blood cells(RBCs) only live for about 120 days. They do not have a nucleus, which is a reason why they don’t live longer.(don’t have the main organelle in cells that has its genetic material,DNA)

Answer 2

Answer is B.

Step-by-step explanation:

The fact that B is right eliminates A and D. C is eliminated because RBCs do not have nuclei.