Earth’s tilt on its axis and revolving around the sun.
Answer:
(D) is composed of widely dispersed populations.
Explanation:
A polytypic species is the one that is composed of various local populations. These local populations differ from each other with respect to one or more genetic traits. Each of the local populations that make a polytypic species exhibit genetic variations among its individuals.
For example, individuals from the local population of human exhibit variations for genetic traits such as skin color, hair color, etc.
Answer:
pollution control in the air
Producers. If we didn’t have producers we wouldn’t have all the other layers of our food chain
Directional selection is a type of natural selection that favors one extreme phenotype over the mean or another extreme. Examples of directional selection include giraffes that have long necks and the darkening of London's peppered moths after the Industrial Revolution.
Stabilizing selection, also known as purifying selection, is a type of natural selection in which genetic diversity decreases as the population stabilizes on a particular trait value. An example of stabilizing selection is birth weigh in humans.
Disruptive selection is a type of natural selection that shows a preference toward the reproduction of genetic material at the extremes within a population.One of the most studied examples of disruptive selection is the case of London's peppered moths.
From Wikipedia
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