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Living things reproduce

Living things reproduce - being better adapted Populations...

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Living things reproduce Within a multicellular organism cells reproduce to enable growth and tissue repair. Individual organisms reproduce. Asexual Reproduction The advantage of asexual reproduction is that it can produce large numbers of offspring very rapidly and it does not require a mate. Asexual reproduction, however, produces offspring which are identical to the parent. Populations in which all of the individuals are identical are more likely to go extinct if the environment fluctuates. Moreover, these populations are less likely to change over time in response to environmental change. Sexual Reproduction Sexual reproduction requires two parents and thus promotes genetic variation. Populations which show variability are more likely to survive environmental fluctuations because there is an increased likelihood that at least some individuals are going to be able to survive due to their
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Unformatted text preview: being better adapted. Populations of living things evolve Evolution refers to changes in the genetic composition of a population. Genetic changes may result in changes in the physical or behavioral characteristics of the individuals. A mutation is a change in the genetic instructions (DNA) of an individual. The change is usually harmful but occasionally it is beneficial. Any beneficial mutations that occur are likely to spread within a population because individuals that possess the mutations will have higher reproductive output and they will reproduce the mutation. Beneficial mutations are therefore likely to result in evolutionary change. Evolutionary change has led to diversity among organisms. To date, approximately 1.8 million different species of organisms have been identified. Biologists estimate that there are between 10 and 200 million species on earth....
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