How do the amount of daylight hours differ between the Poles and the equator? What causes this difference? *

Explanation:

When you are in the northern hemisphere, you are near the north pole. If you are in the Southern Hemisphere, you are closer to the South Pole. As you probably already know, the earth is tilted. When you are closer to the equator, your number of daylight hours increase. The farther you are from the equator, the less daylight you will receive.

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.