Which of the following is NOT a level of genetic resistance?

In the context of genetic resistance, it is essential to understand that levels of resistance typically refer to the ways in which plants can naturally defend themselves against pests and diseases. The concept includes methods like exclusion, protection, and eradication, which describe various strategies for managing pest populations and enhancing plant health through breeding practices that promote inherent resistance.

Exclusion involves preventing pests from entering a growing area, while protection refers to the development of plant traits that make them less susceptible to attacks or infections. Eradication is the complete removal of pests from an area, which can be achieved through different methods.

Cultivation, however, does not fit the definition of a level of genetic resistance. Instead, it refers to the overall practice of growing and managing crops, including soil preparation, sowing, watering, and pest control. While cultivation can influence plant health and productivity, it does not describe a specific type of genetic resistance that plants exhibit against pests and diseases. Thus, this distinction makes cultivation the correct choice in identifying what is not a level of genetic resistance.