Which best describes the sex chromosomes in humans? a. females have one x and one y chromosome. b. males have two y chromosomes. c. males have two different chromosomes. d. males have two x chromosomes.

Explain the side effects of cancer treatments

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

How many types of rock can form from the rock cycle