What is one of the four main points of darwins theory of evolution by natural selection​

19. scientists use meteorites that hit earth to provide evidence of the composition of earth's interior because they hypothesize that

The picture shows a fishing technique called trawling. how might trawling affect marine biodiversity

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