Complete each statement with the correct term from the drop-down menu. Many molecules are moved through the body by
.

provide structure for plants.

Nucleic acids
determine what people look like.

Cells are surrounded and protected by
.

speed up chemical reactions in the body.

Hemoglobin, a protein, is built by
.

The human body is insulated by
.

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