Phil used a chemical solution to indicate the presence of carbon dioxide in the water. When the solution is put into water it turns green. As carbon dioxide is added to the water and chemical solution it will turn yellow. Predict which tubes in Phil's experiment will be yellow after 24 hours?

Which of the following is the best definition for the process of photosynthesis? a.) plants digest sugars to make energy. b.) plants use oxygen and glucose to make carbon dioxide. c.) plants use sunlight and carbon dioxide to make sugars. d.) plants use sunlight to make chlorophyll and chloroplasts.

Most animal cell membranes have proteins that pump. ions out of the cell and potassium ions into this

The blue particles in this image are able to cross the cell membrane through simple diffusion. how will they be transported? outside the cell inside the cell o a. the substances will move directly across the membrane from outside the cell to inside the cell. b. the substances will move through channels in the membrane proteins from outside the cell to inside the cell. o c. the substances will move through channels in the membrane proteins from inside the cell to outside the cell. o d. the substances will move directly across the membrane from inside the cell to outside the cell.