Who was the scientist who discovered the rule of base pairing

If the nucleus of a cell was removed the cell wouldn’t be able to make proteins because

What is responsible for the uneven heating between the poles and the equator on any given day

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?