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How can I remember all of the content in A-Level biology?

A-Level Biology has probably the most content of any of the A-Level sciences! Its tempting to memorise all the content in the textbook but in reality some textbooks will have extra information that is not ac...
JV
Answered by Joseph V. • Biology tutor
5545 Views

Compare and contrast the themes of love and fantasy within "The Great Gatsby" and "The Whitsun Weddings".

Throughout both "The Whitsun Weddings" collection and the novel “The Great Gatsby” the themes of love and fantasy are frequently explored and shown by both poet and author to be somewhat interchang...
OW
Answered by Olivia W. • English tutor
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describe the structure of prokaryotic cell (4 marks)

they don't have a nucleus, the DNA is present in cytoplasm. prokaryotic cell has a cell membrane that controls movement of molecules in and out of the cell. prokaryotic cells also have cell walls that provid...
JL
Answered by Julia L. • Biology tutor
2975 Views

Let z=x+yi such that 16=5z - 3z*, What is z?

z* is the complex conjugate of z therefore z* = x - yi. So 16 + 32i = 5(x + yi)-3(x - yi), real: 16 = 5x - 3x => 16=2x => x=8, imaginary: 32 = 5y + 3y => 32 = 8y => y=4, therefore z = 8 + 4i.
BC
Answered by Ben C. • Maths tutor
3873 Views

Could you explain why water has a high latent heat of vapourisation?

A water molecule is polar. Due to the uneven sharing of electrons in the hydrogen-oxygen covalent bond, the oxygen molecule is slightly negatively charged and the hydrogen atoms are slightly positively charg...
SJ
Answered by Steffan J. • Chemistry tutor
7679 Views