How do you know plant and animal cells are eukaryotic cells?

The oxidizing agent our bodies use to obtain energy from food is oxygen (from the air). if you breathe 15 times a minute (at rest), taking in and exhaling 0.5 l of air with each breath, what volume of air do you breathe each day? air is 21% oxygen by volume. what volume of oxygen do you breathe each day?

Loss of protected health information collected for research should be directly reported to:

The idea of spontaneous generation was disproved by in a experiment involving jars of meat