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Natural selection and selective breeding can both cause changes in animals and plants. The difference between the two is that natural selection happens naturally, but selective breeding only occurs when humans intervene. For this reason selective breeding is sometimes called artificial selection.
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Chemicals that are secreted from antigen-presenting cells then activate helper T cells.
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B. store excess carbon underground
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The fossil fuels have been formed on the basis of organisms that have died, mostly producers. These organisms have carbon stored in them. As they died and got covered by sediments, the carbon has been stored in the lithosphere. Since more and more sediments have been covering the stored carbon, it has been isolated and stored into the lithosphere for tens or even hundreds of millions of years, thus contributing to lowering the amount of carbon in the atmosphere for quite some time, and removing it from its natural cycle.
Cranial nerve V do not have somatic motor fibers that control the extra-ocular muscles. The extraocular muscles are innervated by three cranial nerves, oculomotor nerve , trochlear nerve, abducens nerve.
Trigeminal nerve is the fifth cranial nerve . Its primary function function is to provide sensory and motor innervation to the face. It is main function which transmitting sensory information to the skin, sinuses, and mucous membrane in the face. That nerve is communicates touch , pain and temperature to brain.
Three cranial nerves carry purely sensory information and four cranial nerves carry almost entirely somatic motor information. The remaining cranial nerves carry some combination of sensory, somatic motor and parasympoathetic information.
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