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Describe how you can distinguish between a bacterium and a virus.

Viruses are generally smaller than bacteria and are not living, whereas bacteria are considered as living species as a prokaryote. Viruses have no cytoplasm, cell membranes or cell wall and instead have a pr...
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Answered by Keshana K. • Biology tutor
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How do you approach the question in the ELAT exam?

In order to write a successful essay in your ELAT, and thereby allow you to proceed to the interview round in the Oxford application process, it is key to do multiple past papers (these can be found online)....
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Answered by Claudia R. • ELAT tutor
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What is the difference between mitosis and meiosis?

Mitosis is a process associated with organism growth, and it involves a tetraploid cell dividing to give two genetically identical diploid cells. Meiosis is the process by which gametes are formed, and it in...
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What is the chain rule?

A special rule, the chain rule, exists for differentiating a function of another function (finding dy/dx). Consider the expression cos x 2 . We call such an expression a ‘function of a function’. We could id...
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Answered by Diego M. • Maths tutor
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By discussing the structure and bonding properties of chlorine and sodium chloride, explain why chlorine is a gas at room temperature but sodium chloride is a solid.

Within the chlorine molecule, there are covalent bonds present between each atom of chlorine. This results in the formation of simple molecules, meaning there are no bonds between molecules of chlorine. As a...
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Answered by Alex T. • Chemistry tutor
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