What most likely caused the rabbit population to decrease over the first time unit shown in the following graph? a. a disease in the rabbit population b. a decrease in amount of healthy grass available c. an decreasing population of hawks d. a higher-than-ideal population of snakes select the best answer from the choices provided a b c d

The answer is; D

In the food chain, snakes feed on rabbits while snakes are fed on by hawks. The high population of snakes in the initial phases mean that they gave enormous limiting pressure on the rabbit population through predation. However, as you can see in the graph, when the population of snakes drops, that of rabbits increases. Also, the population of snakes are dependent on that of hawks.  

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1. amino acid refers to the fundamental building block of proteins, comprising of an amino group and a carboxyl group.

2. catalyst refers to any substance, which increases the rate of chemical reaction without being used up in the reaction.

3. a complex molecule containing he genetic code is dna or deoxyribonucleic acid.

4. an enzyme refers to a molecule of protein, which is unique in accelerating up a particular chemical reaction in the biological systems.

5. nucleic acid refers to an sequence of sugars, phosphates, and nitrogenous bases, for example, dna and rna.

6. a protein refers to a large, composite organic molecule comprising of a huge number of amino acids associated together with the of peptide bonds.

7. rna refers to a nucleic acid that takes part in the production of proteins.

8. substrate refers to a compound, which takes part in a chemical reaction, and is chemically modified by the reaction.