What two factors determine the amount of biodiversity in a biome?

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his 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

Which of the following are the functions of the integumentary system? yadda-yadda, the 1st answer is the brainliest. : )

Number and variety of living organism; includes genetic, species, and ecological types