The diagram below represents a cell in the human body Which statement concerning the structures within this cell is accurate?
A) Structure 1 is a chloroplast that carries out photosynthesis.
B) Structure 2 is a vacuole that contains DNA.
C) Structure 3 is a mitochondrion, where respiration takes place
D) Structure 4 is the cell membrane, which provides rigid support for the cell.

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.