The earth's atmosphere consists mainly of nitrogen and oxygen with smaller proportions of other gases such as carbon dioxide. The amount of carbon dioxide in the atmosphere is maintained through a balance between processes such as photosynthesis, respiration and combustion. However this balance is being affected by human activities which are polluting the atmosphere.
The proportion of these gases in the atmosphere is as follows: nitrogen is the most abundant at 78%, oxygen is next at 21%, while others include carbon dioxide at 0.037% and argon at 0.9 % .
Answer:
Here are some ways that you can conserve water on an individual level:
1. Consider the water footprint of your diet.
2. don't leave the tap running needless.
3. Choose and use your appliances wisely.
4. Convert your toilet to a dual flush and don't flush it more then necessary .
5. stop that leaky toilet.
Explanation:
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The answer is D, The structure was probably functional in some ancestor of the modern organism. Vestigial structures are structures that have remained from ancestors but have no function in modern times.
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