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How does the structure of the red blood cell allow it to carry out its functions?

The main function of the red blood cell is transport oxygen around the body to other cells. It contains haemaglobin which allows the binding of oxygen. Its biconcave shape maximises the surface area to incre...
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Answered by Narumi I. • Biology tutor
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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 called the...
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Answered by Orla M. • Biology tutor
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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) An acid group 2) A variable group 3) An amine group. The amine group of one ami...
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Answered by Emma D. • Biology tutor
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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 bacteria. The cell...
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Answered by Ingrid G. • Biology tutor
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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 · Larger brain sizes have promoted increased learning capacity / g...
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