Linnaeus based one of his classification categories on plants. He even named the Kingdom Plantae. Which best describes the organisms in this kingdom? A. They are autotrophic and have eukaryotic cells

B. They are made of prokaryotic cells

C. They are multicellular and do not have cell walls

D. They are always single celled and produce their own food​

It depends on the surface of the levels. the rougher the surface, the greater is the frictional force. for rougher surfaces, you would need to exert greater force to move the object. the concept is that, you must overcome the frictional force in order to bring the object into motion. this is the reason why we add lubricants to the joints so they could easily move. this answer was on