An experiment was designed to determine whether or not ultraviolet light affected the growth of lichens. two groups of lichens were grown under identical conditions, in visible light, except one group of lichens was also exposed to uv light while the other was not. in this experiment the group of lichens grown in visible light without uv light is known as the a. control. b. hypothesis. c. dependent variable. d. limiting factor.

How is the male reproductive system different from other body systems? it isn’t necessary to vital signs. it monitors other body systems, and adjusts if necessary. it transports items from one system to another. it is the only system that produces hormones in the male.

Acar company is testing seatbelts using crash test dummies. the company finds that when cars come to a sudden stop, the crash test dummies' bodies continue to move forward. the seat belt keeps the crash test dummies from hitting the back of the seat in front of them. why do the crash test dummies' bodies continue to move forward even though the car stopped? a. the friction opposing their bodies' movement keeps them in motion. b. the inertia of their bodies keeps them in motion. c. the forward acceleration of the car keeps them in motion. d. the gravity pulling on the car keeps them in motion.

Where can dna be found in a prokaryotic cell