Comprehensive Biology What process is used in this example? Cells come from pre-existing cells. Cells pass genetic information as DNA via reproduction. DNA carries the blueprint for life. Changes in the blueprint lead to changes in living things. Therefore most biologists assume that all living things had a common single-celled ancestor 3.5 billion years ago.

The organelle pictured is found in cells of and is theorized to have once been an independent organism.

Drag the tiles to the correct boxes to complete the pairs. match the nitrogenous base of dna with its complement.

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.