Only two markers of human activity are evident in the stratosphere.

They are indicated by .

Select one:
a. the condition of the ozone layer and the presence of spy planes
b. the flight of rockets and transmission of radio signals
c. the weather that we experience and commercial airplane flight

d. the presence of satellites and the International Space Station

Option A. the condition of the ozone layer and the presence of spy planes.

Explanation:

Stratosphere is very important layer because a very important gas i. e. Ozone is present. Ozone gas makes a layer around the earth which prevents the earth from harmful ultraviolet radiation of the sun. This radiation causes skin disease such as skin cancer. Aeroplane and jets also fly in this region.

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.