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What are receptors?

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, chemicals an...
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Answered by Emily O. • Biology tutor
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What is the difference between nuclear fusion and fission?

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 smaller nuc...
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Answered by Emily O. • Physics tutor
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Convection, conduction and radiation in space

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 few definitions. Convection is the...
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Answered by Daniel S. • Physics tutor
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How are animals cloned?

Firstly what is cloning? Cloning is used to produce individuals that are genetically identical to their parents. To clone animals embryos are used. The nucleus of an adult cell (such as a skin cell) is place...
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Answered by Olivia O. • Biology tutor
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What is the difference between an endocrine and exocrine gland?

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 directly in...
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Answered by Maddalena C. • Biology tutor
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