Why mitosis is important to every living thing?

In the diagram below, the northern hemisphere would be in what season at position a a.fall b. winter c.summer d.spring

What percentage of light hits earth's surface directly?

One important development during the 3rd trimester that will insulate the infant against changes in temperature is a. the deposition of fat under the skin b. the closing of the septum between c. the atria of the heart d. the beginnings of lung functioning e. the beginnings of light and sound sensing