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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...

Differentiation is used to calculate the rate of change. For example, if you have the speed of a car (velocity), and you want to find out the how the speed has changed over time (acceleration), you can di...

White blood cells can have different roles and are important for protecting the body against pathogens. They can ingest a pathogen and destroy it, some produce antitoxins...

Bacteria release toxins to poison and damage cells, leading to symptoms like vomiting and diarrhoea.

When a plant is watered, water moves into the plant by osmosis (the diffusion of water), this means that water moves into the cells causing them to become turgid. When the plant is not being watered, wate...