Which of the following statements best explains why the energy pyramid is narrowest at the top? A The organisms at the top of the pyramid have the largest population sizes
B The organisms at the top of the pyramid receive only a small fraction of the energy that originally enters the system.
The organisms at the top of the pyramid are the most efficient feeders.
D The organisms at the top of the pyramid need only a small amount of energy for their metabolism.

1. environmental factors, such as ph and temperature, can affect the function of an enzyme. a. true b. false 2. which of the following is an organic molecules (ex. vitamins) that an enzyme? a. coenzyme b. product c. active site d. substrate 3. how do enzymes effect the speed of a chemical reaction? a. they speed it up b. they slow it down c. they have no effect on the speed of a reaction 4. during a chemical reaction, an enzyme is used up so that it can only be used one time. a. true b. false 5. which of the following results from a chemical reaction that is catalyzed by an enzymes? a. active site b. product c. substrate d. coenzyme

What is the name of the two satelites on mars

Two critical interventions to turn around the opioid crises are: