Toxin

toxin
(Science: pharmacology) A poison frequently used to refer specifically to a protein produced by some higher plants, certain animals, and pathogenic bacteria. These proteins can be highly toxic to other living organisms. These substances are differentiated from the simple chemical poisons and the vegetable alkaloids by their high molecular weight and antigenicity.

A poisonous substance produced during the metabolism and growth of certain microorganisms and some higher plant and animal species. It is created by organisms in their metabolic processes and proves injurious to other organisms.
Origin: Gr toxikon = arrow poison, from Gr. Toxikos = of or for a bow

Recommended reading: Poisonous animals in New Zealand – Science Learning Hub. (An interesting list of animals in New Zealand that produces toxin)

Circulation

The circulatory system is key to the transport of vital biomolecules and nutrients throughout the body. Learn about the ..

DNA Structure & DNA Replication

DNA is a double helix structure comprised of nucleotides. A nucleotide, in turn, is made up of phosphate molecule, deoxy..

Ecological Research: Measuring & Analysis

This lesson is about the methods used for ecological research, such as quadrat and transect sampling, canopy fogging, an..

Physiological Homeostasis

Homeostasis is essential to maintain conditions within the tolerable limits. Otherwise, the body will fail to function p..

Human Perception – Neurology

This tutorial investigates perception as two people can interpret the same thing differently. Know more about human perc..

Pikas are an indicator species for climate change

Indicator Species and Endangered Species

Certain species are capable of expressing characteristics indicative of the state of the ecosystem they occupy. They are..