A rainbow is an example of light's . 1) refraction
2) reflection
3) absorption
4) transmission

2

Explanation:

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.  

they float because they are less dense than the water itself

something denser than water, like a rock, will sink to the bottom