Biology MCQs

11. 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

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12. Which of the following is the most common use of the reserprine derived from the plant ‘Serpentina’?
[A] Alleviate pain
[B] Alleviate high blood pressure
[C] Alleviate low blood pressure
[D] Cure rickets

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13. It has been observed that after-effects of low temperature treatment are helpful in promoting the flowering in certain plants. Through this the vegetative period of plant becomes short and early flowering takes place. Which of the following is the name given to the phenomenon?
[A] Photoperiodism
[B] Floreignation
[C] Vernalisation
[D] Heliotropism

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14. Which one of the following statements is not correct?
[A] All echinoderms are viviparous
[B] Round worm has no circulatory system
[C] In bony fishes, swim bladder is usually present
[D] In cartilaginous fishes, fertilisation is internal

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15. Consider the following statements with reference to the human body:

  1. The common bile duct releases its contents into the stomach.
  2. The pancreatic duct releases its contents into the duodenum.

Which of the above statements is/are correct?

[A] I only
[B] II only
[C] Both I and II
[D] Neither I nor II

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16. Which vitamin is also called as riboflavin?
[A] Vitamin B1
[B] Vitamin B2
[C] Vitamin B3
[D] Vitamin B6

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

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18. Which is the largest phylum of Animalia?
[A] Arthropoda
[B] Annelida
[C] Moluska
[D] Aves

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19. Into how many subgroups is the plant kingdom classified?
[A] Three
[B] Four
[C] Five
[D] Six

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20. Conifers can tolerate extreme environments because of__?
[A] Presence of vessels
[B] Thick cuticle
[C] Superficial stomata
[D] Broad hardy leaves

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