Which of the following is an example of an effect of natural selection.
A. all of the children of two parents are male.
B. carbon cycles through ecosystem.
C. favorable environmental conditions cause an increased food supply.
D. polar bears have white fur.
Answer: D. polar bears have white fur.
You might also like to view...
A symbiont could be a(n):
A) commensal. B) opportunist. C) parasite. D) all of the above
The ____ in the human body regulates hunger and satiety (a sense of fullness)
a. hypothalamus b. liver c. pancreas d. small intestine e. stomach
One observer noted that a male wood duck from Florida mated with a female wood duck from California. This is an example of
A. gene flow. B. gene frequency. C. range. D. age distribution.
In the following scenario, where could laboratory transmission occur? : A microbiology student was performing a lab exercise. While performing this exercise the student was wearing a lab coat, eye goggles, and gloves. As the exercise was progressing the student diligently recorded the data with a pen, still wearing gloves. At the end of the lab, the student removed her lab coat, goggles and gloves. She proceeded to wash her hands and place her pen into her backpack.
A) students clothes under the lab coat B) lack of handwashing C) students pen D) students backpack