One side of a glass tank contains 40% helium and the other side of the tank contains 20% helium. The sides are connected by a tube that the molecules are free to cross. What happens next? Explain what happens net by describing what the molecules do

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

Which one is an advantage of external fertilization a. the offspring are genetically identical to the parents b. more eggs can be fertilzed at one time c. more sperm can be released at one time d. more protection is available for developing plz

Number and variety of living organisms; includes genetic, species, and ecological types.