Biology MCQs

11. The phenomenon due to which animal sweat to reduce temperature and change electrolyte concentration is called:
[A] Homeorhesis
[B] Homeostasis
[C] Apoptosis
[D] Necrobiosis

Show Answer

12. Which of the following glands is responsible for production of melatonin and to regulate reproductive hormones?
[A] Pineal gland
[B] Pituitary Gland
[C] Hypothalamus
[D] Adrenal Glands

Show Answer

13. Kernel smut and Sheath blight are two common diseases which occur due to excessive use of nitrogen fertilizer. The diseases are most commonly found in which of the following crops?
[A] Rice
[B] Potato
[C] Cotton
[D] Sugarcane

Show Answer

14. Which among the following carries impure blood to human heart?
[A] Pulmonary vein
[B] Vena Cava
[C] Aorta
[D] Pulmonary arteries

Show Answer

15. Which among the following does not have a cell wall?
[A] Mycoplasma
[B] Paramecium
[C] Euglena
[D] Gonyaulax

Show Answer

16. Which of the following is the result of the decrease in white blood cells?
[A] Decrease in Antibodies
[B] Increase in Antigens
[C] Increase in Antibodies
[D] No change

Show Answer

17. Which one of the following is useful for biological control of pests?
[A] Honey bees and locusts
[B] Scorpions and spiders
[C] Wasps and birds
[D] Parrots and kites

Show Answer

18. In which of the following weeks the heart of human embryo starts beating?
[A] in the first week of its development
[B] in the third week of its development
[C] in the fourth week of its development
[D] in the sixth week of its development

Show Answer

19. Who is known as the ‘Father of Bacteriology’?
[A] Louis Pasteur
[B] Leeuwenhoek
[C] Robert Hooke
[D] Edward Jenner

Show Answer

20. Why lysosomes are called suicidal bags?
[A] because it contains digestive enzymes
[B] because it contains endoplasmic reticulum
[C] because it contains Phospholipids
[D] None of these

Show Answer