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.

Explanation:

I am very sorry that I am about to do this but please understand me. need these points... Grades are locking tomorrow and I have a ton of homework to do and I dont have any more points because I have posted many questions with the same questions that nobody has answered. I am very sorry that I am taking your points but please understand what position I am in. If you ever need an essay done please email me at denisesamantha at g mail dot com...I am good at essays not math... I am very sorry please do not report me.

the answer u all are looking for is 4000000000000000000000 million years.

plants absorb water from the soil by osmosis. root hair cells are adapted for this by having a large surface area to speed up osmosis. the absorbed water is transported through the roots to the rest of the plant where it is used for different purposes: it transports dissolved minerals around the plant.