D Question 15
6.7 pts
A virus was introduced to control a rabbit population. At first, the rabbits died in
large numbers, but the death rate decreased over time. Which of the following
explains the decrease in the rabbit death rate?
The rabbits that were originally infected with the virus have been dead for many years
Young rabbits learned to avoid being infected with the virus
The lifespan of this virus is too short to affect the rabbits over a long period of time
Natural selection favored rabbits that are resistant to the virus

a. and c.

Explanation:

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.

affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.