How could the extinction of plants have caused the extinction of some animals?

What is the main fuel source for the work of the cell

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?

Polar zones are cold and tend to be dry because of a pressure system of cold. low high