Which statement correctly describes how an organelle contributes to the ability of the cell to perform life functions? A
The cytoplasm stores the genetic instructions for the cell.

B
The mitochondrion responds to chemical messages in the cell.

C
The lysosomes digest food and break down cell parts when they die.

D
The cell membrane prevents all harmful substances from entering the cell.

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.

Which entry is in the wrong position in the table?

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?