Bacteria - type of microorganisms, Biology

Assignment Help:

Q. Bacteria - type of microorganisms?

Many of us know bacteria only as "germs," invisible to naked eyes that can invade our bodies and make us sick. Few know that many bacteria not only coexist with us all the time, but help us do an amazing array of useful things like make vitamins, break down garbage, and even maintain our atmosphere. These are unicellular microorganisms that are classed as plants. A bacterial cell is about 1μm in length and somewhat smaller in diameter. Bacteria are classified according to their shape. Cocci are spherical, bacilli are cylindrical and spirilla and vibrios are spiral. Bacterial spores are more heat resistant than yeast or mold spores to most processing conditions. Bacteria, with a few exceptions cannot grow in acid media in which yeasts and molds thrive. They multiply by ‘binary fission'. When a bacterium becomes mature it divides into two, these two become four and so on. Bacteria can be found virtually everywhere. They are in the air, the soil, and water, and in and on plants and animals, including us. A single teaspoon of topsoil contains about a billion bacterial cells (and about 120,000 fungal cells and some 25,000 algal cells).

The human mouth is home to more than 500 species of bacteria. Some bacteria (along with archaea) thrive in the most forbidding, uninviting places on Earth, from nearly boiling hot springs to super-chilled Antarctic lakes buried under sheets of ice. Microbes that dwell in these extreme habitats are aptly called extremophiles. The growth of bacteria is very rapid and depends upon the nature of the food material, moisture, temperature and air. Some bacteria do not grow in air but temperature plays a major role in their growth, the optimum being generally 37°C for bacteria pathogenic to humans.


Related Discussions:- Bacteria - type of microorganisms

Define and compare bone modeling and remodeling, Define and compare bone mo...

Define and compare bone modeling and remodeling Bone modeling is a surface-specific activity (apposition or resorption) that produces a net change in the sie and/or shape of a

Explain therapy of specific lipid disorders, Q. Explain Therapy of Specific...

Q. Explain Therapy of Specific Lipid Disorders? a) Very high LDL levels usually result from inherited disorders of lipoprotein metabolism and carry a high risk of premature at

How does self infection by tapeworms occur, How does self infection by tape...

How does self infection by tapeworms occur? Taeniasis patients might be develop the most severe form of the worm infection, cysticercosis, because their feces have eggs and pre

Define meat as a rich source of protein, Define Meat as a Rich Source of Pr...

Define Meat as a Rich Source of Protein? Skeletal or striated muscles are used for food purposes. Flesh of cattle, sheep and swine comprise most of the meat contents. Edible me

Assortment, Assortment is a method in which the meiosis produces new combi...

Assortment is a method in which the meiosis produces new combinations of the genetic information. The paternal and maternal chromosomes line up randomly during the process of syna

Explain pr murmur characterstic and graham steel murmur, Explain PR Murmur ...

Explain PR Murmur characterstic and graham steel murmur? PR Murmur Characteristic: Blowing, decrescendo murmur heard loudest in 2nd and 3rd left intercostal space with increa

Do all molecules of dna have the same amounts, Q. Do all molecules of DNA h...

Q. Do all molecules of DNA have the same amounts of nitrogenous bases? Number and sequence of nitrogenous bases in DNA molecule are key elements in variations which are found i

Animal kingdom/pisces, similarity between pisces & mammals about dirhynous ...

similarity between pisces & mammals about dirhynous condition......

Puerperal psychosis and rape - psychiatric emergencies, Puerperal Psychosis...

Puerperal Psychosis: Child birth can precipitate schizophrenia, depression and mania. Management:  it  depends on  the nature of the symptoms. Danger  to  self and othcrs (inc

What is the imporatnce of food preservation, Imporatnce of food preservatio...

Imporatnce of food preservation These include: increased shelf-life decreased hazards from microbial pathogen decreased spoilage (microbial, enzymatic) in

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd