Hal! while on a mission to mars, you discover a certain substance that is native to the planet, not made up of dead organisms, and is a crystal. when you radio back to nasa headquarters, what would be the most accurate description you could give this substance?

soil

moon rock

rock

mineral

The current thought on the structure of the cell membrane is: a. a static phosphate sandwich of lipids b. a fluid-mosaic of phospholipids and proteins c. a bilayer of proteins with static lipid molecules d. an impermeable bilayer of protein molecules e. a static and permeable phospholipid single layer