Question

Genetic diversity in agricultural crops is threatened by
(a) introduction of high yielding varieties
(b) intensive use of fertilizers
(c) etensive intercropping
(d) intensive use of biopesticides

Answer 1

"Introduction of high yielding varieties" is the correct answer.

Explanation:

• Different growing conditions can cause diversity in a crop, such as a crop that is likely to be shorter if it will grow in a nutrient-poor soil as compared to a crop that will grow in more fertile soil.
• Diversity of a harvested plant can perhaps be most importantly the result of genetic differences, for instance, some early maturity or disease resistance genes may be present in some crops.
• So, the introduction of high yielding varieties is threatening to genetic diversity in agricultural crops.

Answer 2

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• ✒ (a) introduction of high yielding varieties