Some bacteria can use sulfur instead of oxygen as a final electron acceptor.  What would they produce during anaerobic respiration?

Which of the following represents a reactant in the light reactions of photosynthesis?

The electron transport chain consists of a series of redox reactions in which hydrogen ions are transferred to carbon dioxide as the final electron acceptor.

If you measure the air a person inhales, and after, you then observe that the concentration ______ in the air they exhale.

Plants require a lot of water for transpiration, metabolism, and photosynthesis.  How is water used in photosynthesis?

In which organelle of the plant does photosynthesis takes place?

Which part of a long bone is made primarily of spongy bone and located at the ends?

Which sweat glands play the main role in thermoregulation?

Which connective tissue resists compression in intervertebral discs?

Which vitamin is essential for calcium absorption in the intestines?