Recently, some crop plants were genetically modified to be immune to the effects of weed killers. which of the environmental concerns should be considered before planting the resistant crops? a. a increase in crop diversity. b. a decrease in crop diversity. c. a increase in crop yield. d. a decrease in crop yield.

Option B, A decrease in crop diversity.

Explanation:

The genetic diversity will decrease because  genetically modified crop with improvised trait will be a dominant species among all and hence in long run it will overrun all other species of crop which get affected by weed killers. Genetic material of genetically modified crops (GM) will subside the expression of any other genetic trait, thereby limiting the variation in the offspring in coming generation.

Hence, option B is correct

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