When multiple traits are controlled by one particular gene, that gene is called a pleiotropic gene and this kind of effect is known as pleiotropic effect.

Correct Option: B

When multiple traits are controlled by one particular gene, that gene is called a pleiotropic gene and this kind of effect is known as pleiotropic effect.

Wolves are the monogamous animals i.e., they mate with only one partner throughout their lives.

Correct Option: A

Wolves are the monogamous animals i.e., they mate with only one partner throughout their lives.

The octopus is a mollusc of the order Octopoda ankd family Cephalopoda, with bilaterally symmetrical bodies.

Correct Option: D

The octopus is a mollusc of the order Octopoda ankd family Cephalopoda, with bilaterally symmetrical bodies.

Insulin is a kind of peptide hormone. It is secreted from the beta cells of the pancreas. It is the main hormone that regulates the glucose metabolism in humans.

Correct Option: C

Insulin is a kind of peptide hormone. It is secreted from the beta cells of the pancreas. It is the main hormone that regulates the glucose metabolism in humans.

The formation of lymphocytes is known as lymphopoiesis. It occurs at bone marrow. Bone marrow is the flexible tissue in the interior of bones. Lymphocytes are the key components of the lymphactic system involved in immunity.

Correct Option: B

The formation of lymphocytes is known as lymphopoiesis. It occurs at bone marrow. Bone marrow is the flexible tissue in the interior of bones. Lymphocytes are the key components of the lymphactic system involved in immunity.