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Explain the stages of an ECG trace.

The P wave is caused by the contraction of the atria, forcing the blood into the ventricles. The sinoatrial node, produces a wave of depolarisation which causes the atria to contact and therefore the p w...

Answered by • Biology tutor

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For the function f(x) = 4x^3 -3x^2 - 6x, find a) All points where df/dx = 0 and b) State if these points are maximum or minimum points.

Part a) requires you to find df/dx for the given function. To do this, we differentiate the function once, which is done by multiplying the power of each 'part' with the part itself and subtracting 1 from...

Answered by Martin M. • Maths tutor

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What factors influence the rate of photosynthesis?

There are 3 factors that can influence the rate of photosynthesis: light intensity, carbon dioxide concentration and temperature. Light intensity influences photosynthesis as light is required during the ...

Answered by Ruby S. • Biology tutor

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Solve the equation (4x-3)/2 + (7x+1)/6 = 29/2.

x = 5

Answered by Bethan A. • Maths tutor

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Differentiate between a prokaryotic and a eukaryotic cell.

Prokaryotic and eukaryotic cells are the 2 types of cells that exist on Earth.Prokaryotes are single celled organisms that lack a distinct nucleus with a membrane. Their DNA is supercoiled and free floati...

Answered by Matthew M. • Biology tutor

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