Planets formed from a nebular cloud of

Explain how DNA, which is six feet long, can be stored in the nucleus of a tiny human cell.

Charles darwin, after observing variability among plant and animal species in various locations, proposed an explanation for what he saw.

A living thing that is a plant eater

Offspring that result from crosses between parents with different traits are called

2. What is the effect of differential reproduction over time? changes in a population's gene pool the overproduction of beneficial traits interbreeding of two or more populations the disappearance of beneficial alleles

Aquaporins are proteins that control the passage of water molecules across a cell membrane. The protein forms a pore, or opening, in the membrane.

I have moist skin but no scales, and two pairs of legs. Although I have lungs and live on land, my young usually live in water and use gills to breathe.

Why is wind, like force, considered a vector quantity?

When did darwin arrive on the galapagos islands

A cell has 36 chromosomes. After it divides by mitosis, how many chromosomes will be in each cell?