The distance from Earth to Moon can be accurately calculated by pointing high-powered lasers into the Moon’s surface. The time it takes did the light to return is used to find the distance. To make this possible, astronauts on the Apollo 11 Moon mission had to place a device on the Moon that would— A. Store the laser light for future use. B. Bounce the laser light back to Earth. C. Allow the laser light the pass through. D. Change the frequency of the laser light.

The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions

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.

If a grape were placed in a hypertonic solution what would happen and why?