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Diffusion is the spreading out of particles of any substance in solution or of gas resulting in a net movement of an area of high concentration to an area of low concentration. Diffusion is key to the sur...

Invasive species can cause negative effects on biodiversity through out-competing native species, becoming a voracious top predator and killing most of the native animals/fauna (especially since if there ...

Four characteristics of an efficient respiratory surface are: thin epithelium, large surface area, abundant capillaries, ventilation mechanism.

1. The polymerase chain reaction (PCR) is a process to 'amplify' DNA to provide sufficient quantities for further analysis.

PCR involves repeated cycles of heating and cooling of the reac...

The kidney is able to filter blood as it is made up of about a million filtering units. These units are called nephrons which are assosiated with capillaries. The blood flows to the glomerulus, which is a...