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The process responsible for gas exchange in animals is diffusion.
Air, containing oxygen needed for cellular respiration, is inspired in fills the lungs. The high concentration of oxygen in the lung...

Plot the graphs y=x^2+3 and y=2-4x. The solution(s) are the point(s) of intersection. The graphs can be plotted by making a table of values; this is the best method for the quadratic curve. The straight l...

Saliva contains salivary amylase which digest some carbohydrates in mouth

A paragraph comparatively analysing two pieces of poetry should be based around a feature which the poems share, or by which they might be contrasted. This might be a theme or attitude, or a more technica...

Enzymes: Enzymes are biological catalysts, meaning they speed up the rate of the reaction without being used up. An example of an enzyme is amylase, which is produced by the saliva...