Why are organisms classified? A. biologists use a system of classification to group organisms based on their size
B. biologists use a system of classification to group organisms based on their political view
C. biologists use a system of classification to group organisms based on their birth date
D. biologists use a system of classification to group organisms based on their similarities

What are the four basic classes of organic molecules how do they differ structurally and functionally

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.

The normal shape of an enzyme is as shown in structure a. if the enzyme’s shape changes to that shown in structure b, what are two consequences of this change?