Question

Which of the following is true of red blood cells?

A. They have multiple nuclei
B. Once created in bone marrow, they circulate for our lifetime
C. They live for only 120 days
D. They live for only about 20 days

Answer 1

C

Step-by-step explanation:

Answer 2

C. They live for only 120 days

Step-by-step explanation:

Red blood cells are small and biconcave cells that are known for their lack of nucleus. (Rules out A) Aside form that, they also lack mitochondria and robsomes. They are created in the bone marrow and they live for about 100 to 120 days (rules out B and D) before macrophages recycle them.