Which is a good example of genetic variation that could lead to adaptive evolution? Riya and Melissa are identical twins who share similar interests and earn similar grades in school, but plan to attend different colleges.

Since moving to Arizona from Washington state, Bob's skin has become noticeably darker. Most days in Arizona are sunny; most days in Washington state are not sunny.

On an island where the trees bear only hard-shelled nuts, birds that have big, sharp beaks have a better survival rate than those with smaller beaks.

Recently, crops of vegetables such as lettuce and green onions have been contaminated, while they are still on the farm, with bacteria that cause food poisoning. how will science influence the way the government responds to prevent an increase in food-borne diseases? because science has shown that lettuce and green onions are not nutritionally valuable, the government may pass laws that ban the sale of lettuce and green onions. because science has shown that there is no way to prevent bacterial contamination, the government may pass laws that punish businesses that buy lettuce and green onions. because science has shown that the washing of hands prevent the spread of infectious diseases among people, the government may pass laws that require hand washing by everyone who handles food. because science has shown there are ways to find the source of the contamination, the government may pass laws that require farm practices that reduce the contamination of lettuce and green onions.