European rabbits were introduced to Australia in 1859. The rabbits reproduced rapidly in their new environment, displaced other
animals and overgrazed vegetation. In an attempt to reduce the rabbit population, a deadly virus was introduced in 1951. When the virus was first introduced, the rabbits died in large numbers, but the death rate decreased over time. What statement best explains the decrease in the rabbit death rate? A) The virus had a short life span and died out with the rabbits. B) Natural selection favored rabbits that were resistant to the virus. C) The rabbits died of natural causes and the introduced virus did not work. D) Young rabbits exhibited a learned behavior and began to avoid being infected by the virus.
B) Natural selection favored rabbits that were resistant to the virus
Explanation:
Most likely, virus resistance occurred over time, as a consequence of mutation. Individuals that carried the resistance mutation become favourable by natural selection.
Natural selection is evolutionary mechanism which favours traits of an organism that help him survive and reproduce (increase organism's fitness). In the example above, resistant rabbits that survived had the favorable trait (resistance) by natural selection.
Well there are both benefits and negatives. The benefits of it is that people will stop selling so much meat which also means that they stop killing so many innocent animals. People won't be so overweight (aka fat) there are some benefits.
Selective breeding involves choosing parents with particular characteristics to breed together and produce offspring with more desirable characteristics. Humans have selectively bred plants and animals for thousands of years including: crop plants with better yields.
