Ryan, an 8-year-old boy, has the habit of swallowing toothpaste. as a result, his teeth have become discolored. it can be said that ryan's teeth condition is caused by:

What field of science did harry hess study?

Which process of living things produces water that enters the water cycle

8) animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. d) a dog is getting hot in the sunlight, so he moves to a shaded area.