Prokaryotes and Eukaryotes both have cell membranes and DNA

When a gasoline engine burns gasoline, what type of chemical reaction is occurring?

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?

Achemical that is released by an animal as a signal to other members of the same species is called a pheromone. t or f