Which statement best explains why cheetahs and one of their prey, the gazelle, are so fast? The two species co evolved - as one got faster, the other needed to get faster to survive
The two species diverged - they were originally from a common ancestor that was fast.
This was a random occurrence that just happened to benefit both species.
Cheetahs want to naturally hunt gazelles because they are also fast

a tetrad is the foursome during meiosis made by two homologous chromosomes that have each already replicated into a pair of sister chromatids.

imagine a line passing through the center of earth that goes through both the north pole and the south pole. this imaginary line is called an axis. earth spins around its axis, just as a top spins around its spindle. this spinning movement is called earth's rotation. at the same time that the earth spins on its axis, it also orbits, or revolves around the sun. this movement is called revolution.