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Biology exams rely heavily on recollection and your knowledge of key facts and processes. If you have memorised these and have a good understanding of them, questions are often just a case of manipulating...

Osmosis is the movement of water across a semi-permeable membrane, down the concentration gradient. This means that if there is more water on one side of a membrane, it will move to the other side until b...

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...

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...

Osmosis is strictly the movement of water. Its definition is the net movement of water across a partially permeable membrane from a high water potential to a low water potential. Therefore this is only th...