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Questions about speciation are at their core based on Darwin's theory of evolution. As a result, we must recall GCSE knowledge of natural selection to combine with the new concepts in speciation introduce...

First figure out the phenotype (what is visible/expressed) of parents: Normal male x Normal female Next write down their gametes: X^H y and X^H X^...

One advantage of biofuels is that they can help to reduce CO2 emissions, by growing plants that photosynthesise, meaning any CO2 released is more balanced than with fossil fuels.Biofuels are also renewabl...

DNA helicase acts to unwind the 2 strands of DNA by breaking the Hydrogen bonds between them. This means that free nucleotide bases can be attracted and bind to the exposed bases.

AdvantagesAny two from:. Can reproduce quicker and in much larger quantities than sexual reproduction. No competition for mates. No need for motility DisadvantagesAny two from:. No variation, . So more vu...