Option “4” is correct. Blood is red in colour due to the presence of Haemoglobin.
133. Which is the largest organ in human beings?
1. Skin
2. Large Intestine
3. Small Intestine
4. Liver
Option “1” is correct. The skin is the largest organ of the body, with a total area of about 20 square feet. The skin protects us from microbes and the elements, helps regulate body temperature, and permits the sensations of touch, heat, and cold.
134. Yellow fever is a disease spread through which of the following?
1. Flies
2. Mosquito
3. Rat
4. Cockroach
Option “2” is correct. The disease is caused by the yellow fever virus and is spread by the bite of an infected female mosquito. It infects only humans, other primates, and several species of mosquitoes.
135. Myopia is a defect of eyes which is also known as –
1. Far Sightedness
2. Near Sightedness
3. Astigmatism
4. Night Blindness
Option “2” is correct. Nearsightedness, also known as myopia, is a common type of refractive error where close objects appear clearly, but distant objects appear blurry.
136. Who is known as the father of Green Revolution?
1. Dr. Robert Nucleus
2. Dr. Ian Wilmut
3. Dr. N E Borlaug
4. Dr. JC Bose
Option “3” is correct. Dr. N E Borlaug is father of Green Revolution.
137. Insects that transmit diseases are known as –
1. Pathogens
2. Vectors
3. Drones
4. Scalars
Option “2” is correct. An insect that transmits a disease is known as a invertebrate vector, and the disease is referred to as a vector-borne disease.
138. Which one of the following is Sanguinovorous ?
1. Mosquito
2. Bees
3. Housefly
4. Snail
Option “2” is correct. An insect that transmits a disease is known as a invertebrate vector, and the disease is referred to as a vector-borne disease.
139. Which is the second largest gland of Human body?
1. Liver
2. Large Intestine
3. Thorax
4. Pancreas
Option “4” is correct. The second largest gland in human body is pancreas.
140. Some roots, called _________________, arise from an organ other than the radicle.
Option “4” is correct. Adventitious roots, arise from an organ other than the root—usually a stem, sometimes a leaf. They are especially numerous on underground stems. The formation of adventitious roots makes it possible to vegetatively propagate many plants from stem or leaf cuttings.
