13. In a long bone, such as the femur in the leg, the center of the bone contains which substance, responsible
for producing blood cells?
O A. Marrow
O B. Ligaments
O C. Synovial fluid
O D. Plasma

A. Marrow

Explanation:

Marrow is usually found in some bones of the body. The marrow contains fatty stem cells. This stem cells acts as a rich site for blood production in the body.

This is the main reason why marrow transplant technology was discovered to help patients with serious issues regarding anaemia.

Option 1 matches with the first statement,

Option 2 matches with the last statement,

Option 3 matches with the third statement,

Option 4 matches with the second statement.

Explanation:

The cloning is the most controversial artificial process of genetic engineering which is used to produce a genetically identical organism. As it involves creating a new life unnaturally, it becomes the subject of controversy.

Hence, option 1 matches with the first statement.

The hybridization involves breeding 2 different organisms to create a new individual.

Hence, option 2 matches with the last statement.

The process involves the DNA culture with the help of the DNA from the 2 or more sources is known as recombinant DNA.

Hence, option 3 matches with the third statement.

The process of selective breeding is the process of breeding organisms on the basis of their beneficial traits with each other.

Hence, option 4 matches with the second statement.