Where do organisms acquire the oxygen necessary to carry out cellular
respiration?
A. It is removed from water.
B. It is from the atmosphere.
C. It is removed from food.

Describe the primary and secondary immune response in terms of speed and number of antibodies produced?

Rarefaction is used for which of the following? a. creating a representative sample b. studying how disease impacts populations c. rediscovering species thought to be instinct d. determining which sea creatures live in an area

Need the diagram below, which is not drawn to scale, shows the position of the earth, moon, and sun. what type of eclipse occurs when the earth, moon, and sun are lined up in the order shown? a. planetary eclipse b. solar eclipse c. martian eclipse d. lunar eclipse