Which statement best explains how enzymes interact with substrates? A. Each enzymes can bind to a specific substrates for a chemical reaction

B. Enzymes are needed for a substrates to form in chemical reaction

C. Substrates are catalysts fo chemical reactions that produce enzymes

D. Each substrate can bind to multiple different enzymes during a chemical reaction

satellites are frequently used to make observations of the orbit on earth

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.