Explain the impact of the removal of thymus gland on the immune system of a human body.

OR

A farmer maintained beehives in his Brassica field during its flowering season. How will he be benefited?

Thymus us a primary lymphoid organ where immature lymphocytes differentiate into antigen sensitive lymphocytes. Thymus provides microenvironments (favourable conditions) for the development and maturation of T-lymphocytes. Hence removal of thymus gland from the immune system of the human body can affect the formation of T-lymphocytes which help in the production of antibodies, thereby reducing the immune response or defence mechanism of the body. This can easily make a human easily vulnerable to diseases.

OR

Bees are pollinators of many species such as sunflower, brassica, apple and pear. During flowering season insects and bees get attracted to flowers and sucks honey thereby bringing pollination (as by feeding on another flower and at the same time transferring pollen grains to them). Thus by keeping beehives in crop fields during the flowering period increases the rate of pollination and thereby improves the yield- beneficial for crop and honey yield.