Task Essay Example | Topics and Well Written Essays - 1250 words

Task - Essay Examplemitive karyon= nucleus) cells lack a true nucleolus, cellular organelles such as mitochondria, chloroplast, endoplasmic second stomach (ER), Golgi bodies etc. The DNA found in prokaryotes is circular, devoid of basic histones they do not undergo normal cell division of mitosis and meiosis, they multiply by elemental replication of DNA, followed by binary fission, thereby the two daughter cells are clones (exactly similar).Single celled organisms do not possess defined nutrition and excretory mechanisms. some(prenominal) single-celled organisms such as amoeba have wide-eyed cell structures known asvesiclesthat are responsible for excretion andosmoregulation. Moreover, they ventilate through simple diffusion process across the cell membrane. Single cellular organisms can be deemed as simple, as unlike eukaryotic cells where progeny is formed later the fusion of male and the female gametes, and the progeny possesses the characteristics of both the parents, while most single celled organism do not. As a matter of fact, they can mete out a number of times within one hour.Additionally, unlike mostmulticellularorganisms, single-celled organisms can readily synthesize most of the essential substances that they pauperization from simple nutrients. These processes are very simple and straight forward. Also, single-celled organisms can be considered as simple due to their limited capacity to occupy a wide bleed of habitats. This is attributed to the fact that they do not have division oflabour necessary for the exploitation and subsequent utilization of a wide range of resources. On the contrary, they achieve division oflabourby formation of colonies, which they achieve by having their daughter cells remaining attached after subsequent cell divisions. stochastic variable has been estimated as a vital component in the sustenance of species. Most single-celled organisms tend to lack variation owing to their ability to reproduce asexually, implyin g that organisms hold open the exact genetic composition