Source Rev Neurol, 24
Michal Kowalski Bacteria are very small organisms, usually consisting of one cell, that lack chlorophyll a green pigment found in plants that allows for the production of food. Except for viruses, they are the smallest living things on Earth.
Many bacteria are so small that a million of them, laid end-to-end, would measure no more than about five centimeters two inches. The term bacteria is the plural form of the word bacterium, which represents a single organism.
Bacteria are found everywhere, in the air, soil, water, and inside your body and on your skin. They tend to multiply very rapidly under favorable conditions, forming colonies of millions or even billions of organisms within a space as small as a drop of water.
The Dutch merchant and amateur scientist Anton van Leeuwenhoek — was the first person to observe bacteria and other microorganisms. Using single-lens microscopes of his own design, he described bacteria and other microorganisms calling them "animalcules" in a series of letters to the Royal Society of London between and Today, bacteria are classified in the kingdom Procaryotae.
This term refers to the fact that bacteria consist of prokaryotic cells, cells that do not contain a nucleus.
A nucleus is a structure that controls a cell's functions and contains genes. Genes carry the deoxyribonucleic acid [DNA] that determines the characteristics passed on from one generation to the next. The genetic material of bacteria is contained, instead, within a single, circular chain of DNA.
Characteristics of bacteria Bacteria are generally classified into three groups based on their shape. They are described as spherical coccusrodlike bacillusor spiral or corkscrew spirochete [pronounced SPY-ruh-keet] or spirilla.
Some bacteria also have a shape like that of a comma and are known as vibrio. Words to Know Aerobic bacteria: Bacteria that need oxygen in order to live and grow.
Bacteria that do not require oxygen in order to live and grow. A type of bacterium with a rodlike shape. A thick, jelly-like material that surrounds the surface of some bacteria cells.
A type of bacterium with a spherical round shape. Bacteria that break down dead organic matter. Short, hairlike projections that may form on the outer surface of a bacterial cell. A form of reproduction in which a single cell divides to form two new cells.
Whiplike projections on the surface of bacterial cells that make movement possible. A process by which bacteria in food are killed by heating the food to a particular temperature for some given period of time.
Projections that join pairs of bacteria together, making possible the transfer of genetic material between them. A cell that has no distinct nucleus.A "general statement" "intended to develop a unified conceptual scheme for theory and research in the social sciences" was published by nine USA social scientists in Theory was to be based on a "theory of action" in which "the point of reference of all terms is the action of an individual actor or collective of actors".
[D-penicillamine: mechanism of cellular action and induced autoimmune diseases]. [Article in French] Meyer O The fall in the IgM rheumatoid factors under treatment is not sufficient to explain the effectiveness of D-penicillamine in rheumatoid arthritis.
Fact sheet published by the National Human Genome Research Institute (NHGRI) about deoxyribonucleic acid (DNA), where it's found, what it is made of and what it does as well as the DNA double helix.
Nature Vs Nurture Essay Maggie Kent 3/27/14 Child Development p.3 NatureNurture Nature vs. Nurture There is a constant battle between researchers from different fields saying almost all traits come from genetic makeup and that traits are based off of the environment a person is living in.
When it comes down to the argument of nature versus nurture, there is no clear answer. The Importance of Mendel’s Laws in Modern Genetics - The Importance of Mendel’s Laws in Modern Genetics - Human genome is like an intricate library that stores vast volumes of life information.
7. A One of the four major blood groups in the ABO system.
Individuals with this blood group have the A antigen on the surface of their red blood cells, and the anti-B antibody in their blood serum.