What is the structure of the cell membrane and how does it limit particle movement?

Explanation:

The structure of a cell membrane is the outer layer of the cell and it contain various cell organelles which are present in both animal and plant cell. It's act as a barrier between the outside environment and cellular content of the cell. It comprises of phospholipid bilayer and integral protein which allow molecules to pass through the membrane and it limits the movement of molecules in the membrane because of it's hydrophobic interior which make the passage of molecules to be selectively permeable.

4.) metal

"-the movement of carbon from the nonliving environment into living things and back to the environment

-carbon is the essential component of proteins, fats, and carbohydrates (which make up all organisms)

-carbon exists in air, water, and living organisms

-producers convert carbon dioxide in the atmosphere into carbohydrates during photosynthesis

-bacteria in the atmosphere cycles through the system in filtration units

-in cellular respiration, carbon is released back into the atmosphere as carbon dioxide

-some carbon is stored in limestone (forming one of the largest "carbon sinks" on earth)

-largest carbon reservoir on earth= limestone

-carbon stored in the bodies of organisms as fat, oils, or other molecules may be released into the soil or air when the organism dies

-this may form deposits of coal, oil, or natural gas (fossil fuels, which increased the atmospheric carbon dioxide)

-fossil fuels store carbon left over from bodies of organisms that died millions of years ago

-they are located in the surface of earth, deep within the earth and beneath the ocean floor."