Uranus's first moons were discovered in 1787. Some of Uranus's 27 moons were not discovered until 2003. Why do you think it took so long for scientists to discover more moons?

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?