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Manometers used to measure the rate of aerobic cellular respiration would measure:

Manometers used to measure the rate of photosynthesis would measure:

In our experiment with the food item sitting on a pinch of salt (or sugar), what was the dependent variable?

Natural selection is:

What generated the oxygen in the atmosphere?

Which molecule(s) below can cross directly through the membrane.  (Select all that apply.)

What did the oxygen build up in the atmosphere NOT do?

What is predator satiation?

What type of molecules can cross directly through the cell membrane?   (Select all that apply.)

A cell with 2% salt is in an environment with 7% salt. This would be a(n):