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Prokaryotuc and eukarytotic cell & endocrine and exocine glands - Essay Example

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No: Date: Difference between Prokaryotic and Eukaryotic Cells Prokaryotic and eukaryotic cells are different from one another in many aspects. Prokaryotic cells are all the time unicellular (having one cell only) while eukaryotic cells are mostly multicellular (having many cells)…
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Prokaryotuc and eukarytotic cell & endocrine and exocine glands
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Download file to see previous pages Prokaryotic organisms like bacteria have cell walls that have peptidoglycan. Bacteria are unique organisms that have this material inside their cell walls and no any other organism has this material. Some of the eukaryotic cells have cell walls for example eukaryotic animal cells do not have cell walls while eukaryotic plant cells as well as fungi have cell walls that consist of cellulose and chitin (Black 93). Prokaryotic cells lack a nucleus but there is a central nuclear region. In addition, prokaryotes also have a single molecule of DNA that is circular in shape. Nucleus is the most important and unique part of eukaryotic cells and maximum DNA of the cell is present in the nucleus and multiple molecules are present (Campbell and Farrell 16). In prokaryotes, DNA is located in the nuclear region that does not have any membrane while in eukaryotes DNA is enclosed in Nucleus covered by nuclear envelope (Black 80). Eukaryotic organisms are bigger in size as compared to prokaryotic organisms for example eukaryotic organisms consist of size from1 micrometer to 1 millimeter while prokaryotic organism consists of size from 1 to 10 micrometers. Eukaryotic animals have centrioles and centrosome while eukaryotic plants, fungi, algae and prokaryotic organisms do not have centrioles and centrosome. ...
example, all eukaryotic cells have mitochondria except oddball parasites and all eukaryotic plants have chloroplasts that help in the food making process with the help of photosynthesis (Campbell and Farrell 19). Binary fission is the cell division process in prokaryotes while in eukaryotes, cells divide through mitosis and meiosis. Prokaryotic cells divide by asexual reproduction but eukaryotes divide by asexual as well as sexual reproduction (Black 80). Prokaryotes as well as eukaryotes can be autotrophic (generating food themselves) as well as heterotrophic (getting food from other sources). Examples of prokaryotes are bacteria while plants and animals can be taken as examples of eukaryotes. Autotrophic prokaryotes are photosynthetic (who make organic food using energy from sunlight) as well as chemosynthetic (who make organic food using energy from inorganic chemicals) while eukaryotes are photosynthetic but not chemosynthetic (Black 81). Difference between Endocrine and Exocrine Glands Human body consists of two types of glands that are endocrine and exocrine. Endocrine system contains glands that are responsible for discharging their secretions. Endocrine glands are responsible for discharging their secretions within the body while exocrine glands secrete on the body surface. The secretions that are secreted by the glands are the hormones (Clark 229). There are number of hormones that move from here to there in the body in the flow of blood. Level of hormones is influenced due to minerals in the blood, stress, infection in the body and misbalance in the fluid. Both exocrine glands and endocrine glands are formed from epithelial tissue (Clark 229). Exocrine glands secrete with the support of ducts while in endocrine glands, no distinct ducts are present for ...Download file to see next pagesRead More
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