In order for cells in multicellular organisms to exchange gases, a circulatory system must be present.
a. true
b. false

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.  

population. population is the number of people or animals in a particular place. an example of population is over eight million people living in new york city.

here is your answer hope i .