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Question

Stoppage of reproduction in an organism by creating hurdle in its biology or physiology or its destruction by use of another organism is known as
  1. Predation
  2. Competition
  3. Biological control
  4. Physiological control

A
Predation
B
Competition
C
Biological control
D
Physiological control
Solution
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Biological control is keeping the population of an organism or harmful pests and weeds under check by means of natural predators, parasites and amensals. Weed Opuntia in Australia could be brought under control through introduction of Cactoblastis, Gambusia and Guppy fish for mosquito larva etc.
so, the correct answer is 'Biological control'

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