Individuals with type O blood are often called universal donors, and those with type AB blood are called universal recipients. Blood group Oindividuals do not have either A or B antigens on the surface of their RBCs, and their blood serum contains IGM anti-A and anti-B antibodies. Therefore, a group O individual can receive blood only from a group O individual, but can donate blood to individuals of any ABO blood group (i.e., A, B, O or AB).

Correct Option: B

Individuals with type O blood are often called universal donors, and those with type AB blood are called universal recipients. Blood group Oindividuals do not have either A or B antigens on the surface of their RBCs, and their blood serum contains IGM anti-A and anti-B antibodies. Therefore, a group O individual can receive blood only from a group O individual, but can donate blood to individuals of any ABO blood group (i.e., A, B, O or AB).

Intensive farming is an agricultural intensification and mechanization system that aims to maximize yields from available land through various means, such as heavy use of pesticides and chemical fertilizers. It is characterized by a low fallow ratio, higher use of inputs such as capital and labour, and higher crop yields per unit land area.

Correct Option: C

Intensive farming is an agricultural intensification and mechanization system that aims to maximize yields from available land through various means, such as heavy use of pesticides and chemical fertilizers. It is characterized by a low fallow ratio, higher use of inputs such as capital and labour, and higher crop yields per unit land area.

Vitamins A, D, E, and K are the fat-soluble vitamins. Unlike water-soluble vitamins, these vitamins dissolve in fat and are stored in body tissues. Too much vitamin A, D, or K can lead to increased levels that are unhealthy and can cause health consequences. For example, too much vitamin A can lead to birth defects.

Correct Option: D

Vitamins A, D, E, and K are the fat-soluble vitamins. Unlike water-soluble vitamins, these vitamins dissolve in fat and are stored in body tissues. Too much vitamin A, D, or K can lead to increased levels that are unhealthy and can cause health consequences. For example, too much vitamin A can lead to birth defects.

Blood group AB individuals have both A and B antigens on the surface of their RBCs, and their blood plasma does not contain any antibodies against either A or B antigen. Therefore, an individual with type AB blood can receive blood from any group (with AB being preferable), but cannot donate blood to any group other than AB. They are known as universal recipients.

Correct Option: B

Blood group AB individuals have both A and B antigens on the surface of their RBCs, and their blood plasma does not contain any antibodies against either A or B antigen. Therefore, an individual with type AB blood can receive blood from any group (with AB being preferable), but cannot donate blood to any group other than AB. They are known as universal recipients.

The thymus is a specialized primary lymphoid organ of the immune system. Thymosin hormones are typically produced by the thymus gland and trigger the creation of T-cells, which are used by the immune system to fight disease. The thymus gland is only active until puberty.

Correct Option: B

The thymus is a specialized primary lymphoid organ of the immune system. Thymosin hormones are typically produced by the thymus gland and trigger the creation of T-cells, which are used by the immune system to fight disease. The thymus gland is only active until puberty.