7. a is a larger, more inclusive category than kingdom. * class family domain phylum

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?

What is the answer for the complicated molecules that make up living things usually contain carbon. why is carbon so important in these molecules?

How many cells are our body made of ? ♡