What are two basic differences between dna and rna? rna is usually single stranded, while dna is usually double stranded. rna contains uracil, while dna contains thymine. rna is usually double stranded, while dna is usually single stranded. rna contains thymine, while dna contains uracil. rna doesn’t contain cytosine, while dna doesn’t contain adenine.

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