84 results found

Search Results for: toxic

Obligate aerobe

Before we define obligate aerobes, let us first understand and define aerobic organisms. Aerobic organisms are those that... Read More

Dead Man Walking

Dead Man Walking: Wade Davis and the Secret of the Zombie Poison By Patrick D. Hahn Accepted on September 4, 2007 Twenty... Read More

Commensalism

Commensalism Definition What is commensalism? Literally, commensalism is a Latin word that means ‘to eat at the same... Read More

Aerobic bacteria

Aerobic Bacteria Definition What does aerobic mean in biology? As the name suggests, 'aerobe' in biology means organisms... Read More

Predation

In ecology, predation is a mechanism of population control. Thus, when the number of predators is scarce the number of... Read More

Alanine

What is alanine? Alanine is a non-essential amino acid. There are two types of amino acids for mammals namely essential and... Read More

Biological magnification

Definition noun, plural: biological magnification The increasing concentration of a particular substance (e.g. toxin) as it... Read More

Pathogen

What are Pathogens? Pathogens are defined as microscopic organisms, including viruses, bacteria, fungi, and parasites that... Read More

Curare

Definition noun (1) Common name for the plant species, Strychnos toxifera (2) The substance containing the alkaloid... Read More

Industrial Microbiology

Definition noun Related to environmental, social and economic importance that are engaged in the utilization of... Read More

Hemolysis

The breakdown or catabolism of red blood cells or erythrocytes that result in the expulsion of hemoglobin and other... Read More

Eubacteria

Eubacteria are prokaryotic microorganisms consisting of a single cell lacking a nucleus and containing DNA is a single... Read More

Hexosaminidase A

Definition noun A hydrolytic enzyme implicated in the breakdown of ganglioside producing... Read More

Vacuole

A vacuole is a single membrane-bound organelle with no definite shape or size found in both prokaryotic and eukaryotic... Read More

C4 plant

Carbon fixation is a process of taking carbon dioxide in order to synthesize sugar, such as glucose. Thus, carbon dioxide is... Read More

Polygenic inheritance

Polygenic inheritance refers to the kind of inheritance in which the trait is produced from the cumulative effects of many... Read More

Pollution in Freshwater Ecosystems

As with all ecosystems, the existence and operations of human society inevitably have an effect on the way of life in a... Read More

Angiosperm

Angiosperms Definition What is an angiosperm? An angiosperm is a plant that produces flowers. The angiosperms, also... Read More

Enzyme

An enzyme is a biomolecule that can be synthesized biologically (naturally occurring) or through other processes... Read More

Environmental resistance

Environmental Resistance Definition Environmental resistance is such a process in which certain different elements or... Read More

Cell morphology

The basic essence for any living organism is its structural framework which includes appearance, form, and the... Read More

Nasogastric aspiration

Definition noun An aspiration technique in which the gastric contents are removed or drained using a nasogastric tube that... Read More

Selectively-permeable membrane

Selectively Permeable Membrane Definition We can define selectively permeable membranes as those that are selectively... Read More

Streptolysin S

Definition noun A nonantigenic, oxygen-stable β-hemolytic enzyme produced by some bacteria, especially... Read More

Facultative anaerobe

Facultative Anaerobe Definition What does facultative anaerobe mean? Facultative organisms are the most adaptable... Read More

Dohle body

Definition noun, plural: Dohle bodies Round or oval cytoplasmic inclusion of neutrophils containing remnants of rough... Read More

Protist

Protist Definition What is a protist? All protists are eukaryotes, i.e. organisms with a nucleus. However, they are... Read More

Millons test

Definition noun A color reaction test using Millon's reagent to detect phenolic compounds (e.g. tyrosine) Supplement French... Read More

The consequences of antibiotic use in horticulture

Leading articles Frederick R. Falkiner* Department of Clinical Microbiology, Trinity College, Dublin; Central Pathology... Read More

Cnidocyst

Definition noun, plural: cnidocysts A capsule containing thread-like tube (commonly barbed and toxic) found inside the... Read More

Phagosome

Definition noun plural: phagosomes phag·o·some, ˈfæg əˌsoʊm (cell biology) A vesicle that forms by pinching off... Read More

Population Regulation in an Ecosystem

Darwin focused some of this work in regards to the population size of a species, and what factors may affect them. He... Read More

Growth and Development of a Human Baby

Continued from the initial human reproduction of the previous page in this tutorial. Upon arrival in the uterus, the... Read More

Digestion and Absorption of Food

The gastrointestinal (GI) system includes the gastrointestinal tract (mouth, pharynx, esophagus, stomach, small intestine,... Read More

Respiration

Organization of the Respiratory System Each lung is composed of air sacs called alveoli - the sites of gas exchange with... Read More

Protein Activity and Cellular Metabolism

Protein Binding Sites The ability of various molecules and ions to bind to specific sites on the protein surface forms the... Read More

Soils

Where a plant grows and what resources are available to it is of vital importance to the life of a plant. The soil type and... Read More

Mucolipidosis

Definition noun A type of mucopolysaccharides and mucolipids Supplement Lysosomal storage disease is a collective term for... Read More

Nematocyst

All organisms are composed of millions of cells. Many cells serve specific purposes and are specialized to do distinct... Read More

Austin disease

Definition noun A type of lysosomal storage disease that is often caused by a deficiency in multiple sulfatase enzymes, or... Read More