a:environmental changes
b: genetic variation in species
c: competition for unlimited resources
d: gradual warming of the Earth
b: genetic variation in species
c: competition for unlimited resources
d: gradual warming of the Earth
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B is the correct answer, but A is correct to a point.
Envrionmental changes dont have to be present necessarily, but are considered important.
Genetic variation HAS to be present in order for new traits to arise which makes an organism more or less fit for survival in a given envrionment. If genetic variation in the species didnt exist, there would be no gradual changes to bring about speciation or even survival of the fittest, so natural selection wouldnt be possible.
Envrionmental changes dont have to be present necessarily, but are considered important.
Genetic variation HAS to be present in order for new traits to arise which makes an organism more or less fit for survival in a given envrionment. If genetic variation in the species didnt exist, there would be no gradual changes to bring about speciation or even survival of the fittest, so natural selection wouldnt be possible.
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Its A
It is not B because that is caused from natural selection itself.
It is not C because there are NOT unlimited resources. If there were, then there would be no competition.
It is not D because that is only one factor that causes natural selection.
It is A because environmental changes forces organisms to adapt. The ones that cannot will die off of course and the ones that do will live. Natural selection cannot occur without environmental changes.
It is not B because that is caused from natural selection itself.
It is not C because there are NOT unlimited resources. If there were, then there would be no competition.
It is not D because that is only one factor that causes natural selection.
It is A because environmental changes forces organisms to adapt. The ones that cannot will die off of course and the ones that do will live. Natural selection cannot occur without environmental changes.
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B.
Not A or D, because the given environment can induce selection.
Not C, because if resources are unlimited, there's effectively no competition.
Not A or D, because the given environment can induce selection.
Not C, because if resources are unlimited, there's effectively no competition.
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A.
Unlimited resources do not exist. But If the watering hole dries up species will die and some will flourish.
Unlimited resources do not exist. But If the watering hole dries up species will die and some will flourish.
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C
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We cannot do homework for you. Think hard and you'll find your answer or natural selection will NOT select you. LOL :P
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A.