A controlled experiment allows the scientist to isolate and test

Enzymes affect the reactions in living cells by changing the _____ of the reaction.

A theory

The algae at the beginning of the food chain are

An organism that uses energy to produce its own food supply from inorganic compounds is called a(an)

What animals eat both producers and consumers?

Only 10 percent of the energy stored in an organism can be passed on to the next trophic level. Of the remaining energy, some is used for the organism’s life processes, and the res

What is one difference between primary and secondary succession?

What can cause a population to grow?

Which is NOT an adaptation that organisms have for living in flowing water?

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