Weeds do NOT compete with desirable plants for which of the following resources?

Weeds do not compete with desirable plants for pollen because pollen is specifically a reproductive substance produced by flowering plants. It is involved in the process of pollination, where pollen from the male organ of a flower fertilizes the ovule in the female organ of a flower, leading to seed production.

In contrast, resources like water, sunlight, and nutrients are essential for the growth and survival of both weeds and desirable plants. Weeds and desirable plants both compete intensely for these vital resources in their shared environment, and this competition can significantly affect plant health, growth rates, and overall yield. Therefore, the concept of competition for pollen is different and not applicable in the same way as competition for the other resources mentioned.