What are the non-specific defence systems of the human body against pathogens?
What are the non-specific defence systems of the human body against pathogens?
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AQA GCSE Biology
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What are the effects of abstaining from intercourse during ovulation and surgical methods of male and female sterilization on fertility?
What are the effects of abstaining from intercourse during ovulation and surgical methods of male and female sterilization on fertility?
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How do intrauterine devices prevent embryo implantation or release hormones for contraception?
How do intrauterine devices prevent embryo implantation or release hormones for contraception?
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How do barrier methods like condoms and diaphragms prevent sperm from reaching an egg, and what role do spermicidal agents play in this?
How do barrier methods like condoms and diaphragms prevent sperm from reaching an egg, and what role do spermicidal agents play in this?
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How do oral contraceptives, injections, implants, and skin patches prevent egg maturation and release?
How do oral contraceptives, injections, implants, and skin patches prevent egg maturation and release?
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What are the different hormonal and non-hormonal methods of contraception, and how do they work to control fertility?
What are the different hormonal and non-hormonal methods of contraception, and how do they work to control fertility?
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In what ways could genetically modified crops, such as golden rice, improve food supply and nutritional value?
In what ways could genetically modified crops, such as golden rice, improve food supply and nutritional value?
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How does a genetically modified bacterium produce human insulin, and how is it used to treat diabetes?
How does a genetically modified bacterium produce human insulin, and how is it used to treat diabetes?
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What conditions are required for the growth of Fusarium on glucose syrup?
What conditions are required for the growth of Fusarium on glucose syrup?
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How is the fungus Fusarium used to produce mycoprotein, and what makes it suitable for vegetarians?
How is the fungus Fusarium used to produce mycoprotein, and what makes it suitable for vegetarians?
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Explain how using antibiotics only when essential can limit the development of resistant bacteria such as MRSA
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State that some bacteria are resistant to antibiotics which reduces the effectiveness of antibiotics
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Describe the use of antibiotics for the treatment of bacterial infections
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Explain the role of auxin in controlling shoot growth, limited to: (a) auxin is made in the shoot tip (b) auxin diffuses through the plant from the shoot tip (c) auxin is unequally distributed in response to light and gravity (d) auxin stimulates cell elongation
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Explain phototropism and gravitropism of a shoot as examples of the chemical control of plant growth
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Investigate and describe gravitropism and phototropism in shoots and roots
