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A disease-resistant variety of a sexually reproducing crop was planted on a field with an existing non-resistant variety. After a few years, pests severely attacked the plants. The older, non-resistant plants died. However, the recently grown plants survived. Why did the new plants survive?

A. The pests can't attack the new plants.
B. The new plants had the resistant gene.
C. The old plants were covered with low-grade insecticides.
D. The new plant variety was younger than the initial plants.
E. The recently grown plants had an increased life span.



Answer :

GinnyAnswer

Final answer:

Genetic resistance in crop varieties enables survival against pest attacks through selective pressure.


Explanation:

Genetic resistance in crop varieties plays a crucial role in surviving pest attacks. In this scenario, the disease-resistant variety of the crop contained genes that made it resistant to pests, allowing it to survive the attack that eradicated the nonresistant plants. This exemplifies the concept of selective pressure driving the evolution of resistance in crop pests.


Learn more about Crop biodiversity and genetic resistance here:

https://brainly.com/question/51097182


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