Questions: Many farmers are worried about the decreasing genetic diversity of plants associated with generations of artificial selection and inbreeding. Why is limiting random sexual reproduction of food crops concerning?

The answer is the third one: Larger portions of the plant populations are susceptible to the same diseases.

Explanation for each option:

1. Mutations during asexual reproduction decrease plant fitness.

   • This statement is not directly related to the concern about limiting random sexual reproduction. While mutations can occur during asexual reproduction, the main concern with limited genetic diversity is not about mutations but about the lack of genetic variation to adapt to environmental changes or resist diseases.

2. Consumers do not trust identical-appearing produce.

   • While consumer perception can be a factor in agricultural practices, the primary concern with limiting genetic diversity is not about consumer trust but about the biological implications for the crops themselves.

3. Larger portions of the plant populations are susceptible to the same diseases.

   • This is the correct answer. Limiting random sexual reproduction reduces genetic diversity, which means that if a disease affects one plant, it is likely to affect many others because they are genetically similar. This can lead to widespread crop failures.

4. Spores are not viable in an agricultural setting.

   • This statement is not relevant to the concern about limiting random sexual reproduction. Spores are a form of reproduction for some plants and fungi, but the viability of spores is not directly related to the genetic diversity issue in food crops.

In summary, the main concern with limiting random sexual reproduction in food crops is that it reduces genetic diversity, making the crops more vulnerable to diseases.