Whenever an antigen enters the blood, it binds itself with a special kind of white blood cell called lymphocyte. Each Lymphocyte produces only one kind of antibody.

Correct Option: A

Whenever an antigen enters the blood, it binds itself with a special kind of white blood cell called lymphocyte. Each Lymphocyte produces only one kind of antibody.

Growing more than one crop on a piece of land during the year is known as Multiple Cropping.

Correct Option: B

Growing more than one crop on a piece of land during the year is known as Multiple Cropping.

Sarpagandha plant is used to treat blood pressure.

Correct Option: A

Sarpagandha plant is used to treat blood pressure.

Carbon monoxide poisoning can be cured by exposing the affected person to fresh oxygen.

Correct Option: A

Carbon monoxide poisoning can be cured by exposing the affected person to fresh oxygen.

Robert Hooke (1665) observed a section of cork under his microscope and found its structure resembling a ‘honey comb’. He gave the name ‘cell’ to each of the compartments of the honey comb like structure. Two German biologists, M Schleiden and T Schwann, proposed the famous cell theory in 1938-39.

Correct Option: A

Robert Hooke (1665) observed a section of cork under his microscope and found its structure resembling a ‘honey comb’. He gave the name ‘cell’ to each of the compartments of the honey comb like structure. Two German biologists, M Schleiden and T Schwann, proposed the famous cell theory in 1938-39.