24. Increase of greenhouse gases, due to human activity, is warming the oceans. This causes a change in climate. Which three Earth spheres interact in this process? (3 points O Atmosphere, geosphere, and hydrosphere
O Biosphere, hydrosphere, and atmosphere
O Geosphere, cryosphere, and biosphere
O Hydrosphere, geosphere, and atmosphere

How many chromosomes does each human cell contain? a. 23 chromosomes b. 26 chromosomes c. 43 chromosomes d. 46 chromosomes

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.

Adistinctive characteristic of mammals that is not observed in other vertebrates is