WHICH OF THE FOLLOWING WOULD NOT EXPLAIN THE SHARP DECLINE IN THE D...

5. Which of the following would NOT explain the sharp decline in the deer population between 1970and 1975?a. The number of registered hunters in the area increased by 60%.b.The number of wolves also declined.c. A major forest fire occurred in 1972.d.Over 150 new homes were built in the deer’s habitat.

Passage II

Mark’s chemistry project was to study the structure of crystals of the amino acids glycine and L-alanine. First, this involved growing large enough crystals for analysis. Most crystals are grownfrom supersaturated solutions. Supersaturated solutions have an excess amount of solute dissolvedin a solvent at a given temperature. To prepare samples, Mark combined 2 g of water with 40%more amino acid than is normally soluble in that amount of water at room temperature. He thenheated the samples until the amino acid completely dissolved and allowed them to slowly cool toroom temperature.With glycine, Mark obtained crystals suitable for analysis in 17 out of 20 samples and he wasable to collect the data he needed. With L-alanine, he ran into problems. Namely, none of the L-alanine samples crystallized. He tried to increase the supersaturation by dissolving 50%, 60% and70% more L-alanine in excess of solubility, to increase the driving force for crystallization in thesesamples. But that didn’t seem to help.He was sure that these weren’t L-alanine crystals. After spending some time in the library, he foundthat the amino acid L-alanine, is prone to bacterial attack. He hypothesized that bacteria were eat-ing his samples and that the cotton-like substance was a bacterial byproduct. He prepared 20 newL-alanine samples. All of the samples were 40% supersaturated in 2 g of water at room tempera-ture. Mark took great care to keep his samples sterile. He used water that had been passed througha 0.22 µm filter and treated by UV rays. Mark was able to obtain crystals from 15 out of 20solutions.