which of the following is an example of an effect of natural selection?
All of the children of two parents are male.
Carbon cycles through ecosystem.
Favorable environmental conditions cause an increased food supply.
Polar bears have white fur.
Is the answer C?
No. I vote for D.
how so exactly? since it is a benifit to the polar bear that it has white fur? I don't quite understand the definition of natural selection.
Natural selection means that organisms choose to mate with other organisms that have characteristics that help them survive. A polar bear's white fur helps it blend into the ice and snow in its environment.
http://evolution.berkeley.edu/evolibrary/article/evo_25
oh i see, thank you!:)
:-) You're welcome.
Yes, the answer is C. The statement "Favorable environmental conditions cause an increased food supply" is an example of an effect of natural selection.
To arrive at this answer, let's first understand what natural selection is. Natural selection is the process by which certain traits or characteristics become more or less common in a population over successive generations, due to their influence on an organism's ability to survive and reproduce.
In the given options, the first option "All of the children of two parents are male" does not demonstrate natural selection because it does not involve any adaptive traits or selection pressure. The second option "Carbon cycles through ecosystem" describes a natural process but is not directly related to the concept of natural selection. The fourth option "Polar bears have white fur" is an example of an adaptation resulting from natural selection, but it doesn't explicitly demonstrate an effect of natural selection.
On the other hand, the third option "Favorable environmental conditions cause an increased food supply" aligns with the concept of natural selection. When environmental conditions improve and there is an abundance of food resources, individuals that are better able to exploit those resources have a higher chance of survival and reproduction. Over time, this could lead to the accumulation and spread of traits that enhance the ability to acquire or utilize increased food supplies. This process represents an effect of natural selection.
Thus, option C is the correct answer.