The species concept is practical for identification of unfamiliar species and has been used to describe most of the 1.8 million known species on earth.

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 noticeable trend from this graph might be used to make a conclusion?

How do living things obtain phosphorus