The nucleus is like the of the cell. foot

stomach

hand

brain

How do living things obtain phosphorus

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

What are the pros and cons of transect sampling?