Can you help me with this worksheet? I don’t really understand it at at all.

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

How can an organ, such as the lungs, work for multiple body systems?

If the dimensions of a cube-shaped cell with a length,height, and width of 1 micrometer were to double, what would be the cell's new ratio of surface area to volume? a.3 to 1 b.4 to 3 c.1 to 2 d1 to 6