A good analogy for the cell wall is a sturdy fence or wall surrounding a castle, protecting the structure from harm and only allowing entrance by outsiders through specified gates and openings. In this scenario, the wall also keeps inhabitants safe inside, preventing them from venturing out into potential danger.Know More
An analogy is a method of comparing two things in a way that highlights the similarities, typically by using similar features shared between the two. A cell wall within a living organism is similar to a standard wall in the brick-and-mortar world. Cell walls serve multiple purposes such as protecting the cells from mechanical stress, providing tensile strength and plasticity, preventing water loss, and blocking harmful toxins. Cell walls are not found in humans or animals, but exist in other forms of life such as plants, bacteria, algae and fungi.
The composition of cell walls differs according to the cell species, the cell type and the stage of development. In the analogy of the wall around a castle, that wall could also be constructed of various materials, according to how much protection the castle needs, the inhabitants inside, and how capable they are of defending themselves from dangers within and intruders from outside.Learn more about Biology
Animal cells do not have cell walls because they do not need them. Cell walls, which are found in plant cells, maintain cell shape, almost as if each cell has its own exoskeleton. This rigidity allows plants to stand upright without the need for bones or musculature.Full Answer >
Amoeba are unicellular eukaryotes with no cell wall. They reproduce using binary fission and move by the use of pseudopodia. Pseudopodia are false feet that extend out, and then the rest of the body follows. Amoeba are found in ponds, rivers and on the surface of leaves and plants.Full Answer >
Plant-like protists, which are also called green algae, resemble plants in having a cell wall, chlorophyll and the ability to carry out photosynthesis. They are a diverse group of four phyla, but all live in water and have similar mechanisms for movement and reproduction.Full Answer >
Perhaps the clearest analogy that can be made to describe the role of the rough endoplasmic reticulum is that of a factory assembly line. Along its surface, which Dictionary.com describes as "rough" owing to the ribosomes arrayed along its membrane, proteins are synthesized and transported for use in the cell's chemistry.Full Answer >