Why can smaller cells diffuse oxygen and nutrients at a faster rate? small surface area to volume ratio
large surface area to volume ratio
large surface area
more volume than surface area

What is the difference between the conducting zone and the respiratory zone of the respiratory system? the conducting zone is a series of cavities and tubes that move air to the respiratory zone where gases exchange with the bloodstream. the conducting zone exchanges gases between the lungs and the alveoli and the respiratory zone is a series of cavities and tubes that move air to the conducting zone. the conducting zone moves oxygen into the cells and the respiratory zone takes carbon dioxide away from the cells. the conducting zone moves oxygen into the bloodstream and the respiratory zone takes carbon dioxide away from the bloodstream.

What was the land like over 500 million years ago? what was under the sea?

If jane has the blood type ab and marries john who has type o blood what are the possible phenotypes of their first kid?