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Describe what cell differentiation is and provide an example of a cell that undergoes differentiation.

Cell differentiation is the process by which a cell changes to become specialised for its function. As cells change they develop different sub-cellular structures, eventually turning into different types of ...
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Answered by Miranda A. • Biology tutor
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How to answer an extended answer question in an exam such as 'Describe the process of eutrophication (6 marks)'

When answering a 6 mark question such as this you need to ensure you are using the correct scientific terminology and checking off all the key marking points in order to score highly. In this example there a...
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Answered by Avni P. • Biology tutor
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If you have 1.33g of oxygen (Mr = 32) in a container of volume 1000cm^3 at atmospheric pressure (101.3*10^3 Pa), what is the temperature of the gas in Celsius? R=8.314

T=20.2 degrees Celsius. Start by finding number of moles using n=mass/Mr so n=1.33/32=0.0416. Find the volume in m^3 using 1cm^3=1 10^-6 m^3 giving V=1 10^-3 m^3 then rearrange PV=nRT to get T=PV/nR so T=(10...
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Answered by Ethan T. • Physics tutor
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Why does the thermal stability of Group 2 carbonates increase down the group?

Going down the group, Group 2 carbonates decompose at increasingly higher temperatures.This is because the Group 2 metal ion radius/size increases down the group while the charge stays the same.This means th...
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Answered by Saibhan B. • Biology tutor
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Integrate xsin(x) with respect to x

For this use integration by parts, letting the integral = T. Let u = x and dv/dx = sin(x). Differentiating u with respect to x gives du/dx = 1. Integrating dv/dx with respect to x gives v = - cos(x). Now, us...
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Answered by Ethan M. • Maths tutor
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