ANSWER QUICKLY The average size of a grocery store chicken has more than doubled in the past century. What is the most likey reason for this change?

A. Natural selection resulted in a larger species of chicken.

B. Artificial selection created a larger breed of chicken.

C. Mutations occur less frequently in chickens than they did a century ago.

D. Grocery stores used to sell younger chickens.

The average size of grocery store chicken has more than doubled in the past century because artificial selection created a larger breed of chicken. The right option would be B.

Artificial selection refers to deliberate actions by humans to selectively breed organisms based on desired traits.

Because big size chickens are desirable for their meats, breeders and genetic engineers would select this trait and favors it over other alternate traits using appropriate scientific procedures (such as controlled mating). Thus, chicken with undesirable traits gradually fades off the population while those with desirable traits are made to thrive.

More on artificial selection can be found here:

they each offer a fresh glut of resources to the organisms that can arrive and exploit them. as individuals and new species continue to appear, they actively and passively alter the environment. competition for shared resources increases, local abiotic and biotic conditions shift, and the relative abundances of species change accordingly. the process is called ecological succession, and it is one of the earliest and most well-known concepts in ecology.

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