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Explain how natural selction may bring about changes in a population and what conditions may be necessary to bri about speciation A species is a group of organisms that look alike and can reproduce successfully
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a)} How may Variation Arise in Natural populations b) Explain how natural selction may bring about changes in a population and what conditions may be necessary to bri about speciation A species is a group of organisms that look alike and can reproduce successfully to produce fertile offspring. Within a species there is variation which can be caused my meiosis, random fertilisation, mutations and the natural environment. Genetic variation increases the chance for survival of a population if the environment changes. For example the introduction of a new virus in to the new environment may kill some organisms but others may be resistant to it and survive. If all the organisms had been genetically identical they may have all been killed. The species that survive are likely to live longer and pass on their useful genes to future generations. The change in a species over time is called evolution. There are...
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