For an experiment to be considered valid it must produce results that are this each time it is run. -random
-The same or very similar
-opposite
-different

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.

The energy available as a result of the motion of a body is called energy. -potential -gravitational -kinetic -chemical

If your blood becomes too concentrated with iona, what will happen to the red blood cells