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Biology
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How does an action potential cause contraction in skeletal muscle?

The point at which a motor neurone synapses with a muscle fibre is called the neuromuscular junction. The unmyelinated nerve fibre stops around 30 nanometers before the muscle fibre, leaving a gap cal...

Answered by Orla M. Biology tutor
10001 Views

Explain the structure of a Protein and how this can relate to its function.

A protein is a polymer made up of 20 possible amino acid monomers. The amino acid monomers are made up of three components:

 

1)

Answered by Emma D. Biology tutor
60469 Views

What is the Endosymbiosis Theory?

 

Lynn Margulis proposed this theory in 1996. It explains how the eukaryotic cells engulfed through  endophagocytosis some organelles such as mitochondria and chloroplasts, which evolved from ...

Answered by Ingrid G. Biology tutor
4603 Views

Discuss the relative importance of genetic and cultural evolution in the recent evolution of humans.

 

·      Changes in genotype (genetic evolution via natural selection) have lead to cultural evolution in humans by promoting intelligent behaviour

·      L...

Answered by Zana Katarina L. Biology tutor
4345 Views

Discuss the incompleteness of the fossil record and the resulting uncertainties about human evolution.

Incompleteness of the Fossil Record

▪       Fossilisation is an exceptionally rare occurrence that requires an unusual combination of special condi...

Answered by Zana Katarina L. Biology tutor
8973 Views

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