Which elements are in the substance that makes up about 60% of the male human body

What type of graph presents information about how often certain or traits occur?

Why is it bad that some cancer cells can make their own growth hormones?

Which of the following is true about the introduction of a non-native species to an environment? (a) they usually adapt quickly so they can have a positive affect on the environment. (b) they can disrupt the environment and cause much damage and devastation to native species. (c) they usually become predators in a food chain and to keep prey populations under control. (d) because the native species are better-adapted to the environment, the non-native species always end up dying out.