What does dna stand for? also what does rna stand for?

Which of the following is not a main characteristic that scientists focus on when determining which kingdom an organism belongs to

Four types of motile cells in human body?

Suppose you use three different scale to weigh a bag of oranges. one scale says the nag weighs 2.1 lb, and third says it weighs 2.1 lb. the actual weight of the bag of oranges is 2.153 lb. which of the following best decribes these results?