What cells are abundant within the large intestine and produce large amounts of lubricating mucus to aid in the passage of feces to the end of the digestive tract?

Ageologist determines that a sample of a mineral cant be scratched by a steel nail but can be scratched by a masonry drill bit based on this information the sample mineral has to be softer than

The model illustrates a process by which a substance is taken up by a cell

In the diagram below, the northern hemisphere would be in what season at position a a.fall b. winter c.summer d.spring