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Describe the role of the myelin sheath surrounding the axon

It is important to remember that the myelin sheath is essential for our nervous system.It forms a layers of fatty material around the axon. This allows INSULATION, which, in turn, allows quicker conduction o...
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Answered by Ozbil D. • Biology tutor
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What are the key principles of evolution?

Variation: there is variation in the physical and behavioural characteristics of a set of organisms. This variation is caused by a combination of genetic and environmental factors. Inheritance: there is a me...
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Answered by Ivan S. • Biology tutor
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Qu-est ce que tu as fait le weekend dernier?

What did you do last weekend? This question helps the student to think about vocab relating to pastimes and hobbies as well as the passé composé tense. It also opens up the possibility of using the simple fu...
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Answered by Kathy G. • French tutor
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How do I analyse an unseen poem in the exam?

First of all - don't panic! Read the poem through once. Then read it again, underlining any parts that stick out to you. Think about whether you can spot any figures of speech such as metaphors, similes, rep...
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Answered by Hannah B. • English tutor
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Explain why Aluminium and Sulfur do not fit the expected trends of first ionisation energies of period 3?

Firstly, we should define the first ionisation energy The first Ionisation Energy is the energy required to remove one mole of electrons from one mole of gaseous atoms to form a mole of gaseous ions, each wi...
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Answered by Jake G. • Chemistry tutor
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