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Biology Past Questions and Answers

Biology Questions

Question 4066:
Which of the following is the effect of continuous tillage on an ecological system?
  • A Addition of more. humus to the soil
  • B Decrease in productivity
  • C Increase in yield
  • D Improved fertility
  • E Prevention of erosion
View Answer & Explanation
Question 4067:
The most sensitive part of the retina is called
  • A Blindspot
  • B Conjuctiva
  • C Fovea centralis
  • D Choroid coat
  • E Sclerotic coat
View Answer & Explanation
Question 4068:
Which of the following pairs consists of gametes?
  • A Ova and spermatozoa
  • B Spores and sporangium
  • C Flowers and pollen grains
  • D Testes and ovaries
  • E Gametophyte and sporophyte
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Question 4069:
Which of the labelled structures is the nucleus?
  • A I
  • B II
  • C III
  • D IV
  • E V
View Answer & Explanation
Question 4070:
Which of the following labelled structures secretes enzymes which facilitate penetration<br/>of the egg?
  • A I
  • B II
  • C III
  • D IV
  • E V
View Answer & Explanation