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Biology Past Questions and Answers

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Biology Questions

Question 4066:

Which of the following is the effect of continuous tillage on an ecological system?

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A Addition of more. humus to the soil
B Decrease in productivity
C Increase in yield
D Improved fertility
E Prevention of erosion

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Question 4067:

The most sensitive part of the retina is called

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A Blindspot
B Conjuctiva
C Fovea centralis
D Choroid coat
E Sclerotic coat

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Question 4068:

Which of the following pairs consists of gametes?

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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?

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A I
B II
C III
D IV
E V

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Question 4070:

Which of the following labelled structures secretes enzymes which facilitate penetration<br/>of the egg?

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A I
B II
C III
D IV
E V

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