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What is an allele?

Alleles are different forms of a gene. For example, given the gene for eye colour there would be many different colours available. People with brown eyes would have the allele of the eye colour gene co...

Answered by Jessica D. • Biology tutor

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What is the key difference between the rough endoplasmic reticulum (RER), and smooth endoplasmic reticulum (SER)?

The RER is associated with translation of proteins, including protein folding. It is known as 'rough' because it is has ribosomes immersed in it, which makes it easy to remember the protein function.

Answered by Ivan S. • Biology tutor

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Humans have reflexes. Describe the route of an impulse through a reflex arc.

First of all, the IMPULSE IS DECTECTED by receptors.SENSORY neurone passes impulse onto RELAY NEURONE in SPINAL CORD.RELAY neurone passes impulse onto MOTOR neuroneMOTOR neurone passes impulse to EFFECTOR...

Answered by Ozbil D. • Biology tutor

13932 Views

Describe the role of the myelin sheath surrounding the axon

It is important to remember that the myelin sheath is essential for our nervous system.It forms a layers of fatty material around the axon. This allows INSULATION, which, in turn, allows quicker conductio...

Answered by Ozbil D. • Biology tutor

8627 Views

What are the key principles of evolution?

Variation: there is variation in the physical and behavioural characteristics of a set of organisms. This variation is caused by a combination of genetic and environmental factors.

Answered by Ivan S. • Biology tutor

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