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Root hair cells have a very large surface area due to them being very long and having hair like projections. This allows more active transport of mineral ions to take place so the plant is able to take in as...

Motor neurones have a myelin sheath made of Shwann cells. It's an electrical insulator meaning action potentials cannot pass through them. Along the axon there are gaps where there's no myelin sheath, called...

When blood glucose levels drop too low it is detected by hypothalamus. The release of insulin by the pancreas is stopped so no more glucose is converted to glycogen. Instead glycogen, which is stored in the ...

Prokaryotic DNA is different to eukaryotic DNA in that prokaryotic DNA is circular, and thus has an origin of replication . When replication starts, it starts at this origin and occurs bidirectionally - mean...

Animals and plants display structural and behavioural adaptations to their surroundings. Each animal and plant faces certain challenges to their survival such as predators, harsh weather or low food resource...