Nucleic acids also typically contain phosphorous, and nitrogen plays an important structural role in nucleic and proteins. The proteins, being made up a diverse set of amino acids, have, in addition to carbon, hydrogen, oxygen, and nitrogen, the elements sulfur and selenium.
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Predators, food chain, fights with males, toxic water, contamination, plastic
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a twelve-point scale for expressing the local intensity of an earthquake, starting from I virtually imperceptible to XII (total destruction.
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In the natural world, limiting factors like the availability of food, water, shelter and space can change the population of any living organism. Other limiting factors include:competition for resources, predation and disease can also impact populations.
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