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They are a group of specialised cells that respond to different changes in the environment called stimuli. Different types of receptors have different stimuli they react to such as light, sound, chemi...
Nuclear fusion is the opposite to fission. In nuclear fusion, two nuclei of lighter elements combine to create a nucleus of a larger element, whereas in nuclear fission, a nucleus splits into two smal...
On Earth we notice convection through breathing, conduction through heat and radiation through sunlight. But do we notice these in space? And if not, then why? Let’s make a...
An endocrine gland secretes its products, for example hormones, directly into the blood. An example of an endocrine gland is the adrenal gland which secretes adenaline made in the adrenal medulla dire...
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