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cluponka [151]
3 years ago
9

What is natural selection and what are its effects on allele frequencies? (Due at 11:59)

Biology
1 answer:
Roman55 [17]3 years ago
6 0
Natural selection can cause changes in allele frequencies when adaptations that are caused by natural selection cause fitness-increasing alleles to become more common in the population
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Graded depolarization occurs due to the entry of sodium or calcium ions; whereas, graded hyperpolarization occurs due to exit of potassium ions or entry of chloride ions.  

When equal but opposite magnitude of graded depolarization and hyperpolarization occurs at a particular dendride of  a neuron, the positive and negative charges get neutralized causing little or no effect on the total membrane potential.  

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