Answer:
Option 3, Chromatids remain attached to one another until anaphase
Explanation:
Centromere lies at the center, end or other points of the chromosome and joins the two sister chromatids. During cell division, the spindle fibers attaches at the centromere and detaches the chromosomes during the anaphase of the cell division to ensure that each daughter cell gets equal number of chromosomes at the end of mitosis. Centromere plays an essential role in the separation of chromosomes.
Hence, option 3 is correct
Answer:
the limestone is the youngest, and therefore the top most rock layer found at the Grand canyon
Explanation:
I'm not an expert or sum, but with using logic I would choose: DNA plays a role in the growth and reproduction of organisms, DNA guides the formation of an organism's structures.
