What are all the living and components of an environment in the Amazon rainforest?

Why is it important to reduce the number of chromosomes in half when forming gametes for sexual reproduction?

Biomass can be used to generate electricity. biomass relies heavily on agricultural crops. plants release carbon dioxide and water in combustion. plants use photosynthesis to originally generate the energy that is needed. the chemical energy of these plants all started with what energy source?

When analyzing tree rings, what do scientists assume a thin ring indicates?