How much energy is at the producer level?

Explanation:

In a food chain, only 10% of energy is transferred from one trophic level to another trophic level. If the energy produced at the producer level is 1000 J, then the energy available at the primary consumer level will be 100 J and energy available at the secondary consumer level will be 10 J.

name and explain one of the event that occurs during meiosis that increases the variation in offspring even more than simple reproduction?