What is meant by the phrase " evolution through natural selection"?
a- Living organisms that are badlysuited to survive in their environment are able to modify their genes to make themselves better suited to their environment.
b- Living organisms that are better suited to their environment are more likely to survive , reproduce , and pass their genes on to the next generation.
c-living organisms that encounteer changes in their environment are able to modify their genes to survive the change.
d-living organisms that are badly suited to their environment are less likely to survive and reproduce , which makes it less likely that they will pass their genes on to the next generation.
e- both b and d
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The correct response to this question is e – both b and d. The process of natural selection refers to the theory of survival of the fittest. Those organisms that are the best suited to the environment in which they live (ability to access food, ward of predators, mate, secure shelter, etc.) are much more likely to survive long enough to mate and pass on their genes to future generations. Those organisms that are lacking in one or more of their abilities to access life’s essentials or protect themselves from predators are much less likely to survive long enough to mate and pass on their genes to future generations. For example, there are two birds of the same species with slightly different colours of feathers. One of these birds blends better into the background than does the other bird, and as such, the bird that stands out is more likely to be attacked and killed by a predator. The bird that blends well into the background will be more likely to mate, and pass on the gene that led to the more favourable feather colour than the bird that stands out. Over time, the proportion of birds with the favourable feather colour will increase compared to those that stand out until eventually it becomes the norm.
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