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Originally there was only one species of finch (bird) in the Galapagos Islands. However there are now 14 different species of finch in the Galapagos Islands. Suggest an explanation for the development of the 14 different species.

The populations of finches became separated geographically (on different islands). Then genetic variation developed in these isolated communities. Natural selection acted differently in these isolated commun...
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Answered by Francesca N. • Biology tutor
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Describe the difference between the function of a receptor and the function of an effector.

receptors detect a changes in the enviroment and effectors allow a response to be made. an example of this would be the jerk reflex when accidentally touching something thats hot. temperature receptors in th...
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Answered by Anthony D. • Biology tutor
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Explain what an 'enzyme' is.

An enzyme is a catalyst which speeds up a reaction by providing an alternative pathway with lower activation energy required.
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Answered by Yuko C. • Biology tutor
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What are mitochondria and ribosomes and what are their function?

Mitochondria and ribosomes are both structures inside the animal cell. Mitochondria are the site of respiration. They supply energy to the cell by aerobic respiration. Ribosomes are strucutres where protein ...
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Answered by Rebekah L. • Biology tutor
17269 Views

How do hormones affect the menstrual cycle?

There are 3 hormones mentioned in the AQA GCSE Biology specification. These are FSH (follicle stimulating hormone), LH (leuteinising hormone), and oestrogen. FSH and LH are produced by the pituitary gland in...
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Answered by Vanisha M. • Biology tutor
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