251. Haematopoiesis take place in ___________.

1. Lungs
2. Pancreas
3. Liver
4. Bone marrow

Option “4” is correct
Haematopoiesis refers to the commitment and differentiation processes that lead to the formation of all blood cells from haematopoietic stem cells. In adults, haematopoiesis occurs mainly in the bone marrow.
252. ________ is a hormone that regulates the amount of glucose in the blood.

1. Glucogen
2. Thyroxine
3. Oxytocin
4. Insulin

Option “4” is correct
Insulin is a hormone made by the pancreas that allows body to use sugar (glucose) from carbohydrates in the food that for energy or to store glucose for future use.
253. Who is known as the ‘Father of Green Revolution’?

1. G. Paul
2. Norman Borlaug
3. Van Neil
4. Dr. Mithchell

Option “2” is correct
Norman Ernest Borlaug was an American agronomist and humanitarian who led initiatives worldwide that contributed to the extensive increases in agricultural production termed the Green Revolution. He is known as Father of Green Revolution.
254. The oxygen liberated during photosynthesis comes from –

1. Water
2. Carbon dioxide
3. Glucose
4. Chlorophyll

Option “1” is correct
The oxygen liberated during photosynthesis comes from Water.
255. Term Vitamin was coined by –

1. Charles Levaran
2. Casimir Funk
3. Robert koch
4. Robert hooke

Option “2” is correct
The term Vitamin was coined by Casimir Funk.
256. Nutrients are recycled in the atmosphere with the help of certain microorganisms referred to as –

1. Producers
2. Consumers
3. Decomposers
4. None of these

Option “3” is correct
A decomposer is an organism that decomposes, or breaks down, organic material such as the remains of dead organisms. Decomposers include bacteria and fungi. Nutrients are recycled in the atmosphere with the help of them.
257. Scurvy is caused due to the deficiency of –

1. Vitamin-D
2. Vitamin-K
3. Vitamin-E
4. Vitamin-C

Option “4” is correct
Scurvy is a disease resulting from a lack of vitamin C.
258. Deficiency of which of the following causes non-clotting of blood?

1. Vitamin C
2. Vitamin K
3. Vitamin E
4. Vitamin B12

Option “2” is correct
Vitamin K deficiency causes the non-clotting of blood.
259. The process of producing energy in plants is known as –

1. Absorption
2. Reduction
3. Photosynthesis
4. Transpiration

Option “3” is correct
Plants produce energy from light through a process known as photosynthesis.
260. Which Virus causes Chicken Pox?

1. Rubella Virus
2. Varicella zoster virus
3. Rabies
4. Variola Virus

Option “2” is correct
Chickenpox, also known as varicella, is a highly contagious disease caused by the initial infection with varicella zoster virus (VZV).
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