The tiny hollow air sacs in the lungs where gas exchange takes place are the a. alveoli b. lymph nodes c. capillaries d. bronchioles

How would salinity change if more pure water were added to the 1,461,000 grams of ocean water

Which post disaster phase is generally characterized by optimism due to an infusion of resources?

What are factors of littering

4. What happens to a substance when It dissolves?

Which statement describes the motion of the sun? The sun rotated on an axis. The sun does not rotate. The sun moves around earth. The sun orbits the solar system.

Which of the following show population variation? Bacteria becomes resistant to penicillin. Galapagos Island finches have different sized beaks depending on which island they are on because of the different kind of seeds available to eat on each

At what pint in the cell cycle do cells begin to divide uncontrollably

Is produced along with water at the end of normal cellular respiration?

Stimulation of a cell by a molecule that the cell itself makes is called stimulation

From the producer level to which level does energy flow directly? A. decomposer B. tertiary consumer C. secondary consumer D. primary consumer