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Oxygenated blood flows into the left atrium from the lungs via the pulmonary vein, when the left atrium contracts the blood flows down into the left ventricle via the mitral valve (which divides the at...

Here a thoroughly thought out response to the question should be formulated it is not enough to simply know the name and role of plant hormones within it.
Start with a factor, it is helpful to kn...

After reading this question we know that exercise causes body temperature to rise. The question is asking how the brain monitors body temperature, with the key words being 'explain' an...

Primary - where amino acids are in the correct order in the polypeptide chain.

Secondary - where small structures within the chain begin to form (including alpha helices and beta pleated ...

Secondary: localised folding within the polypeptide chain that is stabilised by hydrogen bonds. The most common secondary protein structures are alpha helices and beta sheets. Tertiary: this is the final ...