Which of the following is the best description of natural selection?
the struggle to exist.
the change in variation of a species.
survival of the fittest.
overproduction of offspring

Johnny rode his bike 4 blicks down the street to his friend's house once he got to his friend house and realized he could not cone out to play he turned aroubd and went back home.what is displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

Crossing over and independent assortment are important activities that occur during meiosis. what is the significance of these activities

This is collection of data made by comparing objects in standard units. in science, the units are metric.