Biology MCQs

Correct answer B. Aerobic respiration

Correct answer C. Down's syndrome

Correct answer D. Haemoglobin

Correct answer D. Kidney-shaped

Correct answer B. Insects

Correct answer C. No pedicels

Correct answer B. More antidiuretic hormone

Correct answer B. Sword bean seed

Correct answer C. The bicuspid and tricuspid valves suddenly close

Correct answer D. Both A and B

Correct answer A. Biochemical Oxygen Demand

Correct answer D. Rate of reaction

Correct answer C. Thermal adaptation shown by animals

Correct answer D. Regular shape

Correct answer D. Unicellular alga

Correct answer C. Brain

Correct answer A. 4.5 to 6.2 million

Correct answer C. 4,500 and 10,000

Correct answer B. 4.0 to 5.2 million

Correct answer A. Phagocytosis