Biology MCQs – Page 54

✅ D. Ammonia

Option A: Creatinine Option B: Trimethyamine oxide Option C: Pyrimidine Option D: Ammonia Correct Answer : Ammonia Read more

✅ C. The whole body cells are in contact with water

Option A: It does not produce waste material Option B: Due to absence of mesoderm Option C: The whole body cells are in contact with water Option D: It has pseudocoelom. Correct Answer : The whole body cells are in contact with water Read more

✅ C. Haemocoel

Option A: Digestive tract Option B: Intestines Option C: Haemocoel Option D: Coelom Correct Answer : Haemocoel Read more

✅ C. O2

Option A: CO2 Option B: H2O Option C: O2 Option D: Both A and B Correct Answer : O2 Read more

✅ C. 55%

Option A: 35% Option B: 45% Option C: 55% Option D: 75% Correct Answer : 55% Read more

✅ C. Rapid heat production.

Option A: Providing insulation in cold environment. Option B: Providing insulation in hot environment Option C: Rapid heat production. Option D: Controlling heat production. Correct Answer : Rapid heat production. Read more

✅ C. Evaporative cooling.

Option A: Pigmentation. Option B: Respiration. Option C: Evaporative cooling. Option D: Excretion. Correct Answer : Evaporative cooling. Read more

✅ B. Embracing the enzymes and other proteins and prevent their denaturation.

Option A: Elevation of temperature in cold conditions. Option B: Embracing the enzymes and other proteins and prevent their denaturation. Option C: Change the chemical nature of other proteins thus making them heat resistant. Option D: Help in evaporative cooling. Correct Answer : Embracing the enzymes and other proteins and prevent their denaturation. Read more

✅ B. Ectotherms

Option A: Endotherms Option B: Ectotherms Option C: Heterotherms Option D: Homeotherms Correct Answer : Ectotherms Read more

✅ C. Osmoregualtion

Option A: Homeostasis Option B: Hemostasis Option C: Osmoregualtion Option D: Thermoregulation Correct Answer : Osmoregualtion Read more

✅ A. Increases transpiration by increasing the surface area of the leav

Option A: Increases transpiration by increasing the surface area of the leav Option B: Small and thick leaves to decrease the surface area proportional to the volume of the leav Option C: Stomata closing in sufficient supply, and opening in restricted supply of water. Option D: None of these Correct Answer : Increases transpiration by increasing the surface area of… Read more

✅ A. Osmoconformers

Option A: Osmoconformers Option B: Osmoregulators Option C: Both depend upon the concentration of sea water Option D: None of these Correct Answer : Osmoconformers Read more

✅ D. Bony fishes

Option A: Hagfish Option B: Jelly Fish Option C: Star Fish Option D: Bony fishes Correct Answer : Bony fishes Read more

✅ A. Opening

Option A: Opening Option B: Closure Option C: Both of these Option D: None of these Correct Answer : Opening Read more

✅ C. Fungi

Option A: Bacteria Option B: Viruses Option C: Fungi Option D: Cyanobacteria Correct Answer : Fungi Read more

✅ B. Lowers.

Option A: Increases. Option B: Lowers. Option C: Doesnt effect. Option D: Maintains. Correct Answer : Lowers. Read more

✅ A. Fishes

Option A: Fishes Option B: Amphibians Option C: Reptiles Option D: Mammals Correct Answer : Fishes Read more

✅ B. Active transport

Option A: Diffusion Option B: Active transport Option C: Osmosis Option D: All of these Correct Answer : Active transport Read more

✅ C. They are present lateral to the oesophagus.

Option A: There are 5-7 pairs of heart. Option B: They are present between 1-7th segments. Option C: They are present lateral to the oesophagus. Option D: They pump blood from ventral to dorsal vessel. Correct Answer : They are present lateral to the oesophagus. Read more

✅ B. Hemoglobin

Option A: Antibodies Option B: Hemoglobin Option C: Enzymes Option D: Proteins Correct Answer : Hemoglobin Read more