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How does Natural Selection occur?

In the population of a species there will always be a selection pressure (new predator/competitor/ presence of disease) There is genetic variation within the population so new alleles can arise due to random...
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Why does the first ionisation energy of atoms generally increase across a period?

The first ionisation energy is defined as the energy required to remove one mole of electrons from each atom of a mole of gaseous atoms. As we go along a period in the periodic table, the atomic number incre...
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How does DNA replication work?

DNA replication is called semi-conservative, because each original strand is used to create a new strand. In order to do this, first we need to separate the two strands: they are unwound and unzipped by the ...
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Answered by Ellie T. • Biology tutor
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Express as a single logarithm 2 loga 6 loga 3 [2 marks]

loga12 explantion:from simples rules of logs
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How can I spot patterns more easily in Abstract Reasoning, when the shapes seem random?

If you're struggling to spot patterns in the shapes on an abstract reasoning question, try to remember the few key ways the question writers tend to make a relationship between the two "sets", or p...
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Answered by Ellie T. • UCAT tutor
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