Question

Match the description with the correct term. Answers can be used more than once!  

Group of answer choices

Crayfish fight each other to determine which male will mate with females. They fight by charging each other and clashing their claws together. The male with bigger claws usually wins. What is this describing?

      [ Choose ]            Evolutionary trade-off            Intersexual selection            Stabilizing selection            Intrasexual selection            Founder effect      

In a small group of people living in a remote area, there is a high incidence of “blue skin”, a condition that results from a variation in the structure of hemoglobin. All of the “blue-skinned” residents can trace their ancestry to one couple, who were among the original settlers of this region. The unusually high frequency of “blue skin” in the area is an example of

      [ Choose ]            Evolutionary trade-off            Intersexual selection            Stabilizing selection            Intrasexual selection            Founder effect      

Robins typically lay four eggs during each reproductive event. If more than four chicks are hatched, each may be malnourished, and if fewer than four chicks are hatched, it may result in too few viable offspring to pass on the parent’s genes. This is an example of [ Choose ]            Evolutionary trade-off            Intersexual selection            Stabilizing selection            Intrasexual selection            Founder effect   

Answer 1

1. In this, the mating between males and females is diced by the competition between two males. The males with better power a trait is selected over another male who is weak. This is a type of sexual selection. Since the organism of same-sex is competing with each other for females. This is an Intrasexual selection.

The answer is Intrasexual.

2. As we can see the frequency of one trait is more than the others. Here the blue color frequency is more and dominant over the other. This is a case of genetic drift. Here some individuals are separated from the ancestor and form the blue skin. This separation of individuals from the original population is due to the founder effect.

The answer is the founder effect.

3. As we can see in this question if two many offsprings are produced some of them die due to hunger. The population is stabilized and the factor has controlled the populations. This is a case of stabilizing selection.

The answer is stabilizing selection.