How does the response to acetylcholine in the presence of nifedipine compare to the response to acetylcholine without nifedipine? what response is there to nifedipine by itself (if any)?

After fertilization, which type of cellular division is responsible for the growth and development of a complex, multicellular organism?

The circles, or orbits, for electrons are called energy levels. each level can hold only a certain number of electrons. add electrons to each level until you can't add any more. how many electrons can each level hold?

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?