figure 12 shows a root tip with cells in different stages of mitosis. The image was magnified 400 x. Explain how a magnification of 400 x can be obtained using the lenses on a light microscope.

your body is trying to warm itself up. or more precisely, sensors in your skin send messages to your brain to generate heat to your body.

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).   so the answer is a.

not necessarily. higher fitness requires the organism to be reproductive successful. for example, an organism at age 10 with 15 offspring is much more fit than an organism at age 15 with only 5 offspring.

your answer is going to be physical weathering