Some sharks and dolphins are about the same size and shape and they live in the same habitat. But dolphins are mammals and sharks are fish. What is the phenomenon, and how does it occur?

Which of the following is the best definition of aerobic respiration? o a. the cellular process that releases energy by breaking down glucose o b. physical activity that involves the repeated motion of large muscle groups o c. physical activity that increases heart rate and breathing rate o d. the cellular process that converts solar energy to chemical energy

Which gas found in the earth's atmosphere greatly impacts the daily range of temperature on earth. a) oxygen b) hydrogen c) nitrogen d) water vapor

Select the word from the list that best fits the definition the temperature to which air must cool to be saturated