A nucleotide consists of three different structures:
- A nitrogenous base
- A five-carbon sugar
- One or more phosphate groups
A cell manages to form a rod shape, There is only one example of the more general subject of how a cell develops any shape, have dominated the study of bacterial morphology. An object has coccoid shapes.
The usefulness of bacterial form is further supported by two evolutionary theories. Earliest, shape has a vector through evolutionary time, with coccoid species deriving at the extremities of evolutionary lines and rod-like animals emerging first. A characteristic that develops gradually suggests that selective factors are at work. Second, prokaryotes from various genealogies may morphologically converge, suggesting that having a similar shape may be advantageous in some circumstances. In light of this, a variety of morphological differences can be seen in the Archaea, despite having a cell wall made of non-peptidoglycan.
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Epigenesis
Epigenesis is the concept that emphasizes development resulting from ongoing bidirectional exchanges between heredity and all levels of the environment.
Epigenesis is the development of organisms such as plants, animals and fungi from an egg, seed, or spore or egg through a series of phases in which unorganized cells differentiate into organs and organs systems. The theory of epigenesis which claimed that structures evolve during development that are not already preformed was created by the German physician C. F. Wolff in 1759.