Answer:
Ozone
Explanation:
Ozone is considered a pollutant in the troposphere, but in the stratosphere it is essential to life on earth because it absorbs biologically harmful UV radiation. The mesosphere and the thermosphere are two additional atmospheric layers above the stratosphere.
I believe it is called "the last stage" or maturity.
Answer:
Different groups of bacteria help in the cycling of nitrogen , carbon and phosphorus by chemical fixing or releasing in environment.
Explanation:The ecosystem contains flow of energy and cycling of minerals.
In the cycling of minerals, the micro-organisms help in fixing atmospheric nutrients e.g., nitrogen fixation by some bacteria and release the nutrients to the environment by decomposition of organic matters.
Different groups of bacteria help in the cycling of nitrogen , carbon and phosphorus by chemical fixing or releasing in environment.
A 5-carbon base, C,A,G,T are the 5 bases available
Answer:
B cell membranes protect a cell,and cell walls do not
