Practice It! Select the statement that accurately summarizes cell membrane structure and function.

A. The cell membrane consists of a phospholipid bilayer that consists of a top layer that likes water and a bottom layer that does not like water.

B. The cell membrane consists of a phospholipid bilayer that contains water loving molecules within the middle section that appear tail-like in structure.

C. The cell membrane consists of a phospholipid bilayer that consists of four layers of molecules that function to prevent all particles from entering the cell.

D. The cell membrane consists of a phospholipid bilayer that contains water-loving molecules facing the interior and exterior of the cell.

You decide that the introduction should also discuss the extremophiles that are referred to as the archaea. these single-cell organisms are considered "extremophiles" due to their ability to survive and reproduce in environmental conditions that would be hostile for most living organisms. archaea species have been isolated from highly acidic sulfur springs, ocean floor thermal vents with temperatures that exceed boiling, and subarctic ice well below freezing. while still considered to be prokaryotic, the archaea have numerous differences that place them apart from the bacteria. choose the characteristics that separate the archaea from other prokaryotic cells. select all that apply. view available hint(s) select all that apply. archaea lack true peptidoglycan in their cell walls. the morphology of the cell is rigid and is geometric in shape, similar to a sphere or cylinder. the cytoplasmic membrane lipids of archaea have branched or ringform hydrocarbon chains. all currently identified and characterized archaea have been linked as the causative agent to an animal or human disease.

The nursing instructor has been observing nursing students initiate an iv infusion. which action(s), if made by the nursing student, indicates that further instruction is needed? (select all that apply.) the nursing student:

Which member of the following food chain will be least affected by ddt, a pesticide water pollutant, if bio-magnification is occurring? algae> zooplankton> crayfish> leopard frog> large mouth bass