Which of the following is not a normal constituent of lymph?
a. water
b. dietary lipids
c. red blood cells
d. lymphocytes
e. ions

Red blood cells

Explanation:

Lymph is a colorless fluid that contains white blood cells and the fluid drains into the bloodstream through the lymphatic system. The lymph provide protection from the pathogens and helps in providing immunity to the organisms.

Lymphatic system contains water, lymphocytes, ions and dietary lipids. Red blood cells are absent in lymph which makes it a colorless fluid.

Thus, the correct answer is option (c).

Chemotherapy works by stopping or slowing the growth of cancer cells, which grow and divide quickly. It can also harm healthy cells that divide quickly, such as those that line your mouth and intestines or cause your hair to grow. Damage to healthy cells may cause side effects. Chemotherapy kills cells that are in the process of splitting into 2 new cells. Because cancer cells divide much more often than most normal cells, chemotherapy is much more likely to kill them. Some drugs kill dividing cells by damaging the part of the cell's control centre that makes it divide.