Given the data, how long is the cell cycle for these cells?

it takes three hours for the nucleus to divide and one hour for the cytoplasm to divide.
after eight hours, the cell will start dividing again.
it takes two hours for the cell to copy its genetic material.

There is no as such fixed time period within which a cell divides. Different cells take different time periods to divide and complete the cell cycle however in human beings a typical cell takes 24 hours to divide while the cells in the intestine complete on life cycle of cell formation in 9-10 hours.

As given in this case

It takes three hours for the nucleus to divide = 3 hours

One hour for the cytoplasm to divide = 2

It takes two hours for the cell to copy its genetic material. = 2 hours

So one cycle of cell division takes place with in (3+2+2) = 7 hours

After 8 hours the same process is repeated and thus the total time taken for division = (7+8+7) = 22 hours

answer:

the water molecules are transferred from the roots to the stem or top parts of the tall tree because of important properties of water which are adhesion, cohesion and capillary action. cohesion is the property of water molecules keeps water molecules in a combined state by sharing of bonds between them at the atomic level. adhesion allows the interaction of water molecules with other substances or substrate. adhesion will cause the attachment of water molecules to the wall of the vessel (xylem) of the plant. capillary action occurs when the adhesive force to the vessel wall is stronger than the cohesive force between water molecules. capillary action mimics the transfer of water from a tube or pipe. in this way water utilizes its property to transfer water from down to top level of the plant.  

the actual answer was 160934