15. Which of the following are considered sources of "Chemical Pollutants?"
A. man made fertilizers
B. insecticides
C. pesticides
D. All the above

its probably

D. all the above

Explanation:

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a neutral ph of 7 and normal organism temperature is needed for a certain enzyme to be effective.  

what would happen to the enzyme if the ph and/or temperature fluctuate greatly from the norm?  

a.the enzyme’s hydrogen bonds will break.  

b.the activation energy will increase.  

c.more product will be formed.

d.the ideal temperature and ph for the enzyme function will decrease.  

your body is trying to warm itself up. or more precisely, sensors in your skin send messages to your brain to generate heat to your body.