Top answers

What is a chiral carbon?

A carbon atom bonded to 4 different groups.
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Answered by Katie D. • Chemistry tutor
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What is the all or nothing principle?

Basically this means that if the threshold voltage of a neurone is reached -40mV, then a stimulus will be generated of always +40mV. If the threshold is not reached then there will be no signal.
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Answered by Katie D. • Biology tutor
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What is speciation?

Speciation is the EVOLUTION of a NEW SPECIES from an EXHISTING SPECIES. If two populations are seperated so the flow of alleles stops (e.g geographic isolation- a physical barrier that prevents the 2 from br...
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Answered by Katie D. • Biology tutor
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What is sex linkage?

Sex linkage is a type of genetic disease, where the gene with the faulty allele is carried on the X chromosome. Women have 2X chromosomes whilst men only have 1. Consequently if the diseased allele is recess...
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Answered by Katie D. • Biology tutor
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Define relative atomic mass.

Relative atomic mass is the average mass of an atom of an element, relative to 1/12 the mass of carbon-12.
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Answered by Aisha O. • Chemistry tutor
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