Hello
_________
The answer is A. Nitrous oxide.(laughing gas)
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The answer is D. All of the Above.
Answer:
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Explanation:
The carbon cycle describes the process in which carbon atoms continually travel from the atmosphere to the Earth and then back into the atmosphere. Carbon is released back into the atmosphere when organisms die, volcanoes erupt, fires blaze, fossil fuels are burned, and through a variety of other mechanisms.
1-Awareness of tension - by concentrating on an area of your body, you learn to recognize tension.
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2-Tensing the muscles.
3-Letting go of the tensing.
4-Awareness of relaxation - you concentrate on the particular area of your body, and you learn to recognize the feeling of relaxation.
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How/When-The best position for practicing progressive relaxation technique is lying down. Some people use this technique just before falling asleep, but you can use it at anytime of the day.
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The oxygen in the upper atmosphere combine to form ozone layer (o3) that allows to colonize surface water.
Explanation:
The fossil stomatolites are formed at about 3.0 ga laminated bacteria. they form the sediments to fall into a thin film of bacteria, these bacteria binds with the sediment and grows through it.
Cynobacteria uses water, CO2 and sunlight to create their own food and produce oxygen as a by product. The significance of stromatolites is that they are earliest fossil evidence life on earth.
They were first organism to photosynthesis and produce oxygen.
