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How are blood vessels fit for purpose?

Arteries - carry blood at high pressure away from the heart. Their narrow lumen and thick, muscular wall allows them to do this effectively. The elastic, muscular wall allows for expansion and relaxation of ...
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Answered by Anna T. • Biology tutor
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Solve the simultaneous equations: 3x+4y=19, x-6y= -23.

In order to solve these simultaneous equations we first want to eliminate one of the variables (x or y) and find a solution to the variable remaining (y or x) and then use this solution to find the second va...
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Answered by Nathalie L. • Maths tutor
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Explain how enzymes work.

Worth four marks Enzymes are biological catalysts which are used in reactions. A reaction will typically involve an enzyme and a substrate. Enzymes are complementary to the substrate they combine to form an ...
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Answered by Moyo K. • Biology tutor
4074 Views

Theme: Light and Dark

Consider what the topic light and dark refers to. they are contrasting matters, and we must find ways to represent this in the art produced. Maybe get creative by actually combining the two together. conside...
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Answered by Sabha H. • Art tutor
2763 Views

Describe Ionic/ covalent bonding

Ionic bonding: When a metal loses electron(s) and a non-metal gains electron(s) to achieve a full outer shell For example, sodium chloride (NaCl) Points to make: Which atom loses electrons Which atom gains e...
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Answered by Aimee L. • Chemistry tutor
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