How do flowering and fruiting bodies of angiosperms represent an evolutionary advancement over gymHow do flowering and fruiting bodies of angiosperms represent an evolutionary advancement over gymnosperms? nosperms?

Icant be totally sure but i would say with confidence that it is example #1 about cells.

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

Be prepared.experiment breaking point of rubber bands measured in certain amount of temperature communication

that's all i luck!