Which best describes a centromere? sister chromosomes that are held together by a chromatid
paired chromosomes that have genes arranged in the same order
the part of a chromosome that joins the sister chromatids
the material that makes up a chromosome

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

Using meiosis, the sporophyte produces spores that are .

What process occurs during cellular development as the cell changes into a specific type of cell with specialized functions? a. binary fission b. fusion c. differentiation d. meiosis