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What is the difference in structure between arteries and veins?

Arteries carry blood away from the heart to the rest of the body and veins then take blood back to the heart. Because the heart directly pumps blood into the arteries by its forceful contractions, arteries c...
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Answered by Emma R. • Biology tutor
7660 Views

Draw the curve for x^2-5x+6

In order to find the intercepts of this curve, we first need to factorise the quadratic equation. We need to find 2 numbers that add together to equal -5 and those two same numbers multiply together to equal...
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Answered by Nilja S. • Maths tutor
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Explain how bacteria can become resistant to antibiotics.

Sometimes, a chance mutation in bacterial DNA allows certain bacteria to become resistant to certain types of antibiotic. When an antibiotic is given, only the non-resistant strains of bacteria will be kille...
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Answered by Rachel A. • Biology tutor
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On a Production Possibility Frontier diagram, indicate a point where resources are efficiently allocated (label X) and an inefficient one (labelled Y). Explain why X is efficient, why Y is inefficient and how output could be increased from both.

Concave PPF diagram - point X anywhere on the curve, point Y strictly inside the curve. X is efficient because an increase in output of one good cannot be achieved without reducing the output of the other (f...
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Answered by Karl T. • Economics tutor
2193 Views

What is ratio analysis and why is it being used?

Ratio analysis is a numerical technique of re-expressing financial statements. It aids decision making by summarising and interpreting financial statements more easily. There are different sets of ratios, ea...
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Answered by Nazik S. • Accounting tutor
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