By: Sammy Stein
The value of poisonous plants lies not simply in the fact that they are poisonous but in the chemical nature of the toxins themselves. There are plants which produce poisons which are powerful enough to kill you if you brush against them such as certain...
By: Alison Bowler
The bacterium Bordetella pertussis is a small pleomorphic gram-negative staining cocco-bacillus. It is the causative organism of whooping cough, a condition also known by the medical term pertussis. While classic whooping cough is known as a childhood disease, Bordetella pertussis also causes respiratory illness in...
Introduction to mitosis
By: Tami Port MS
You grew from a zygote, or fertilized egg, into an organism with trillions of specialized cells. Mitosis is the process that enabled you to grow and develop after the fateful meeting of egg and sperm that became "you". Cells must divide in order for an...
Insects and their importance
By: Brenda Nelson
It might surprise you to know, but insects, those tiny pesky creatures capable of ruining a picnic, are more beneficial to the planet than are humans. Of all the known life forms currently on Earth, more than half are insects. Insects have been around since...
Insects and their importance
By: Jacquie Schmall
Although they exist in enormous numbers and variety everywhere in the world, taking on incredible forms and colors, insects serve humankind by accident, not by intention. But serve us exceedingly well they do. Insects are an essential part of building up, as well as breaking...
Insects and their importance
By: Gillian Taber
Why are insects important? The simple answer is that they are part of the food chain and are useful in pollination. Of course there is a great deal more to the subject but to cover the whole area would take a book. For the purposes...
By: Tami Port MS
Enzymes are catalysts in living cells; proteins that speed up chemical reactions. Without enzymes, cellular reactions would occur at a much slower rate or not at all; making life impossible. * Enzyme Substrate Complex * The word catalyst is a general term for something that...
What are fixed action patterns (FAP) in animals?
By: Tami Port MS
A fixed action pattern (FAP) is an instinctive behavioral response that is triggered by a very specific stimulus. Once triggered, the FAP behavior can't be stopped 'midstream', but must play out to completion.Fixed action patterns are produced by a neural network known as the...
Evolution do Organisms always get more Complex
By: Jamie Craig
Evolution is a controversial yet magnificent theory which begins to analyse the living world in which we live and view it for what it once was and what it has the potential to become. Evolution is of course a theory developed by arguably the most...
Spontaneous generation of life
By: Tami Port MS
Although today we understand that living things arise from other living things, the idea of spontaneous generation was entrenched in the minds of man throughout most of history. Spontaneous generation is the belief that, on a daily basis, living things arise from nonliving material. This...

 

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