Why do chromosomes condense at the start of mitosis?

Aclient says to a nurse, "i have trouble sleeping and wake up several times during the night." what instructions should the nurse provide to the client? select all that apply.

Differences between compact bone and cartilage

Select the situation bellow that would produce a total displacement of zero. a. a trip to the moon and then to mars b. a horse galloping from one end of a field to another c. the criss-crossing path of a bug as it flies from flower to flower d.a round-trip ride to school and back