Biology Stuff
GCSE Biology
This blog will cover and explain the specification for Edexcel triple science course 2013 for biology. Hope it helps :)
Monday, 20 May 2013
3.33 understand that the incidence of mutations can be increased by exposure to ionising radiation (for example gamma rays, X-rays and ultraviolet rays) and some chemical mutagens (for example chemicals in tobacco).
There are things that make you more likely to have a mutated gene, these include: ionising radiation and chemical mutagens like some chemicals in tobacco.
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Labels: 3.33, Inheritance, Section 3
3.32 understand that resistance to antibiotics can increase in bacterial populations, and appreciate how such an increase can lead to infections being difficult to control
Bacteria experience mutations (the reproduce very frequently so it is not rare.) These mutations can mean that they are no longer affected by a certain antibiotic, this makes it easier for them to survive. If bacteria evolve to be resistant to drugs we are treating them with then they are difficult to control; sometimes they can be stopped using a different antibiotic, but some are becoming resistant to all the drugs that we know of...
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Labels: 3.32, Inheritance, Section 3
3.31 understand that many mutations are harmful but some are neutral and a few are beneficial
A lot of mutations are harmful, like genetic diseases; cystic fibrosis.
Some don't change the chances of survival: like having a different colour hair.
There are a few mutations which are beneficial, for example a insect pollinated plant becoming brighter.
Posted by Hannah A at 10:35 No comments:
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Labels: 3.31, Inheritance, Section 3
3.30 describe the process of evolution by means of natural selection
This blog will cover and explain the specification for Edexcel triple science course 2013 for biology. Hope it helps :)
Monday, 20 May 2013
3.33 understand that the incidence of mutations can be increased by exposure to ionising radiation (for example gamma rays, X-rays and ultraviolet rays) and some chemical mutagens (for example chemicals in tobacco).
There are things that make you more likely to have a mutated gene, these include: ionising radiation and chemical mutagens like some chemicals in tobacco.
Posted by Hannah A at 10:41 No comments:
Email This
BlogThis!
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Labels: 3.33, Inheritance, Section 3
3.32 understand that resistance to antibiotics can increase in bacterial populations, and appreciate how such an increase can lead to infections being difficult to control
Bacteria experience mutations (the reproduce very frequently so it is not rare.) These mutations can mean that they are no longer affected by a certain antibiotic, this makes it easier for them to survive. If bacteria evolve to be resistant to drugs we are treating them with then they are difficult to control; sometimes they can be stopped using a different antibiotic, but some are becoming resistant to all the drugs that we know of...
Posted by Hannah A at 10:39 No comments:
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Labels: 3.32, Inheritance, Section 3
3.31 understand that many mutations are harmful but some are neutral and a few are beneficial
A lot of mutations are harmful, like genetic diseases; cystic fibrosis.
Some don't change the chances of survival: like having a different colour hair.
There are a few mutations which are beneficial, for example a insect pollinated plant becoming brighter.
Posted by Hannah A at 10:35 No comments:
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Labels: 3.31, Inheritance, Section 3
3.30 describe the process of evolution by means of natural selection