A hunting lion is responding to what stimulus?

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?

What part of the brain is highlighted in the diagram below?

Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell