Question 6 of 10 A scientist bred fruit flies in two separate containers with different food
sources for many generations. When she put the fruit flies from the two
containers together again, she observed that the flies preferred mates raised
on the same food. Which conclusion can the scientist draw?
A. Fruit flies prefer the container where they were bred.
B. Fruit flies mate randomly regardless of how they were bred.
Ο Ο Ο
C. Fruit flies can adapt to eating different food sources.
D. Fruit flies prefer mates adapted to the same food source.
SUBMIT

D. Fruit flies prefer mates adapted to the same food source.

Explanation:

Food and diet varies depending on the location of an animal, that being said, it is in the nature of an animal to mate with another in order to produce offspring who can survive on the same food source. Instinctively, a fly would see a mate who's diet differed and think that their offspring would not be able to survive due to the lack of that varying food source.  

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.