Acell's membrane is composed of two layers of lipid molecules. what is the main function of a cell membrane? a. store energy for later use b. direct the functions of the cell's organelles c. construct long chains of amino acids d. control what enters and exits 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.

Contrast how pollination is different among gymnosperms and angiosperms.

To determine if a particular plant is homozygous or heterozygous, you would have to test cross with a