Which statement is a hypothesis these students might be using in their experiment? O A. If a toy car is rolled down ramps of different steepness, it will roll fastest on the steepest ramp. O B. It's fun to see how fast the cars roll down the steepest ramps. O C. Will a toy car roll faster down a steeper ramp? D. This experiment tests how the speed of a toy car changes with the steepness of the ramp.

If the birth rate of a population of dolphins is 2.0, the death rate is 0.5, and the population size is 100, what is this dolphin's population growth?

The bacteria inside a tube worm would be analogous to what organism in the ocean ecosystem near the waters surface? a. photosynthetic algae b. shrimp c. clown fish d. parasitic lamprey

Drag each tile to the correct box. the body monitors the levels of oxygen in the blood to regulate breathing. isabel is running in a marathon and is near the finish line. she feels out of breath. how will her nervous system work to generate a reaction? arrange the tiles in chronological order. isabel's breathing rate increases. sensory receptors in the arteries detect low oxygen levels. the brain sends signals through motor neurons. sensory neurons generate an impulse. the central nervous system relays an impulse to certain brain regions.