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What is negative feedback and what is positive feedback? Give an example for each of where it is important in regulation?

Negative feedback : occurs where the feedback causes the corrective measures to be "switched off", and in doing so returns the system to its original level. Example: Temperature regulation in mamma...
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Answered by Sarah B. • Biology tutor
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(Briefly) describe the four phases of aerobic respiration?

Glycolysis: Takes place in the cytoplasm and involves the oxidation of a 6-carbon glucose molecule to two 3-carbon pyruvate molecules with a net gain of ATP and reduced NAD (2 molecules of each per glucose m...
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Answered by Sarah B. • Biology tutor
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What is the difference between Mitosis and Meiosis?

Both meiosis and mitosis are types of nuclear division . The main difference between the two is the ​number ​of nuclear divisions that take place: Mitosis ​: involves one nuclear division which produces two ...
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Answered by Sarah B. • Biology tutor
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What is the function of mitochondria?

Mitochondria are the 'powerhouses' of the eukaryotic cell. These organelles are the sites of cellular respiration, the metabolic process that generates energy from carbohydrates in the cell. The energy produ...
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Answered by Sarah B. • Biology tutor
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What is evolution and why does it happen?

Evolution is a constant process that allows life forms to adapt to a changing environment. How does the environment change, though? Well, there are several sources of variation in every ecosystem. Variation ...
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Answered by Mathilda B. • Biology tutor
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