Answer is A. A population becomes separated by environmental factors into two groups that do not reproduce with one another.
When a population of a species become geographically separated then gene flow between them stops. Over a period of time, the population may become genetically different in response to the natural selection due to different environments. Selection and genetic drift will act differently on these two separated populations. This will results into two separate species. This type of speciation is called allopatric speciation.
Here's what I found :)
-During prophase, the nucleus disappears, spindle fibers form, and DNA condenses into chromosomes which are sister chromatids. During metaphase, the sister chromatids align along the equator of the cell by attaching their centromeres to the spindle fibers.
Answer:
Well, the coriolis effect is an invisible force that deflects the wind. In the northern hemisphere, winds blow to the right, and in the southern hemisphere, they blow to the left. Without this force, the tropics would be much hotter, and the poles much colder than they are today.
Explanation:
Answer:
c. Individuals experience differential success in their ability to survive or reproduce due to differences in certain traits.
Explanation:
Natural selection works on a population when genetic variations are present in its members. Some genetic traits make the organisms better adapted to the prevailing surroundings. These individuals survive more and reproduce more successfully due to the presence of specific genetic traits. Over the generations, the proportion of the beneficial genetic trait increases due to the increased reproductive success of these individuals. This is called natural selection. On the other hand, the individuals that lack these traits survive and reproduce less.
