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Chaacteristics of living things

Living things differ from non-living things based on certain characteristics. There are 7 characteristics that identify living things and these can be remembered with the acronym MRS GREN. Movement Respirati...
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Answered by Bubaraye U. • Biology tutor
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Define homeostasis and explain it in the context of blood glucose concentration.

Homeostasis is the maintenance of an constant internal environment around a strict set of parameters . Homeostasis is important to maintain optimal conditions for biochemical reactions within the body, espec...
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Answered by Jake S. • Biology tutor
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How should I revise?

First of all it is important to have clear and useful notes to revise from. Keep your school notes organised and you can write your own notes while looking back over these online sessions. I personally found...
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Answered by Sarah B. • Biology tutor
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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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