What does aptitite?

What do you call someone who does things for others? What 2 hormones are made in testes? 3 stages of meiosis? What is partly brown is in the schoolyard is moving can be seen with the unaided eye and gives off oxygen? How many steps in a yard? Why is it important to not play in the laboratory? What is rubrous? What do scientists use to solve problems or answer questions? How does steam conduct electricity? Why is Sarah Boones invention important? What does science involves? What is the mass of 3.01 x 1024 molecules of CL2? What ecosystem would most be affected by the fact salt water is denser than fresh water? Gene regulation is necessary in living organisms? What is the state of impaired awareness in which the mind and senses are dulled to environmental stimuli? Is a viewpoint that cannot be proven true? Why does a carpet become threadbare? Which property of matter depends on the amount of matter present? Requesting objects rejecting interactions sharing ideas and seeking social interaction are examples of? How do you know when nuts are stale?