The front door to your house because it determines what comes in and out of the house.
The wall of your house... you are bringing supplies in and taking garbage out... you live inside protected from the weather other nasty things outside.
The cell membrane is similar to the outer factory walls.
Maybe but the real answer is the time in your life
People live in towns. People are multicellular organisms consisting of trillions of cells. Each cell has a cell membrane.
The Plant Vacuole can be compared to a vacuum cleaner They can be compared to a water tank, as they hold the plant cell's water.
As a general rule, practically all the internal organelles of a cell are covered by a protective membrane, except for one type, which couldn't even be called a real organelle, and those are the Ribosomes. More a macromolecular assemble than a cell organelle, the reason because they aren't membrane-bound is because they can directly interact with the membrane in order to exchange proteins, so, having their own membrane would actually act as a barrier for them to do their job correctly.
This is kinda hard
Maybe but the real answer is the time in your life
People live in towns. People are multicellular organisms consisting of trillions of cells. Each cell has a cell membrane.
The Plant Vacuole can be compared to a vacuum cleaner They can be compared to a water tank, as they hold the plant cell's water.
The cytoplasm is all of the material within a eukaryotic cell, enclosed by the cell membrane, except for the cell nucleus. The cytoplasm is about 80% water and is usually colorless.
cell membrane!!! not ribosomes! -wrong plant cells have cell walls and animal cells have cell membrane, it might seem right but it is wrong. Nearly all cells have a mitochondrion.^ While the answer above is correct, the real answer is Cell Membrane. So all cells have cytoplasm, AND cell membranes.
A real life analogy of the parts of the cell might be a comparison between a cell and a shopping mall. For example, the nucleus of the cell manages everything in the cell, while the manager of the mall manages each area. The mitochondria can be compared to the food court in the mall, where all energy is obtained.
Osmosis certainly does happen regularly in real life. Osmosis is the transportation of water from one side of a membrane to the other side of a membrane.
The ozone or an eggshell
example: secretion of proteins like enzymes, peptide hormones and antibodies from cells. the cell membrane folds inward, trapping a small amount of matter from the extracellular fluid. :)
the answer is insulin
C.S. Lewis believed that what we take for real life is a "shadowlands" compared to eternal life.
exoxytosis - may not be a real word. it could not be found on Dictionary.com so it was found on wiki.Exocytosis (ek-soh-sy-TOH-sis; from Greek ἔξω "out" and English cyto- "cell" from Gk. κύτος "receptacle") is the durable process by which a cell directs the contents of secretory vesicles out of the cell membrane. These membrane-bound vesicles contain soluble proteins to be secreted to the extracellular environment, as well as membrane proteins and lipids that are sent to become components of the cell membrane.