MCQ
Genetic erosion is due to:
- ADeforestation.
- BShifting cultivation.
- CAdoption of genetically uniform varieties.
- DAll of the above.
Explanation:
Genetic erosion is a process whereby an already limited gene pool of an endangered species of plant or animal diminishes even more when individuals from the surviving population die off without getting a chance to meet and breed with others in their endangered low population.
Low genetic diversity in a population of wild animals and plants leads to a further diminishing gene pool, inbreeding and a weakening immune system and fast tracks that species towards eventual extinction.
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Reason : Adaptive forms of a given trait tend to become more common; less adaptive ones become less common or disappear.
Consumption of which one of the following foods can prevent the kind of blindness associated with vitamin ‘A’ deficiency?