In human reproduction, of the chromosomes come from each parent.

The type of fossil where the name literally means "turning to stone".

Explain in your own words what caused pangea to separate and why we don't worry about earthquakes in florida.

Why does competiton happen? a: different organisms have different needsb: there are limited resources in an ecosystemc: there are no predators in an ecosystemd: organisms do not need the same resources (i think it's b but i'm not sure)