Answer:
Without the respiratory system your blood would be useless. The circulatory and respiratory systems work together to circulate blood and oxygen throughout the body
Explanation:
Everyone of us knows that there was an Intense Volcanic activity for the first billion year of Earth. Due to the circumstances, the amount of gases in our atmosphere was very unsupportable for existence of life(Very similar like the atmosphere of Mars & Venus of today).
Amount of Carbon dioxide was most abundant whereas oxygen was very little. Then, the changes which affect the proportion of gases were:
1) For Increasing Oxygen. - The only and most important source of increasing oxygen was the "Photosynthesis by Plants".
2) For decreasing Carbon dioxide. - (i) Absorbed by plants in order to do the process of photosynthesis.
(ii) Most of the CO2 dissolved in Oceans and many locked in <span>sedimentary rocks, such as limestone, and in fossil fuels.
In that way, Our Atmosphere evolved,and now we're able to survive (If we care about our environment)
Hope this helps!</span>
A chemical equation describes a chemical reaction. Reactants are starting materials and are written on the left-hand side of the equation. Products are the end-result of the reaction and are written on the right-hand side of the equation.
Carbohydrates<span> are the sugars, starches and fibers found in fruits, grains, vegetables and milk products
proteins are meats.
</span>Lipids<span> are a group of naturally occurring molecules that include fats, waxes, sterols, fat-soluble vitamins (such as vitamins A, D, E, and K), monoglycerides, diglycerides, triglycerides, phospholipids, and others.
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nucleic acids are <span>complex organic substance present in living cells, especially DNA or RNA, whose molecules consist of many nucleotides linked in a long chain.</span>
Answer:
B
Explanation:
because it makes you want to know what happens in an experiment
