AQA · Biology · 8461
GCSE Biology: Control and coordination
Homeostasis and response · AQA GCSE Biology (8461), specification point 4.5.4.1. Cards are generated from the exam board's own specification for "Control and coordination", and every card links back to the page it came from. Separate science only. Specification © AQA — used with attribution.
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What is phototropism?
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A plant's growth response to light.
What is gravitropism (geotropism)?
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A plant's growth response to gravity.
Unequal distributions of ? cause unequal growth rates in plant roots and shoots.
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auxin
Why do plant shoots bend towards light?
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Auxin builds up on the shaded side, so that side grows faster and the shoot bends towards the light.
Which plant hormone is important in initiating seed germination?
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Gibberellins.
Which plant hormone controls cell division and the ripening of fruits?
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Ethene.
Plants produce ? to coordinate and control growth and responses to light and gravity.
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hormones
What does AQA GCSE Biology required practical 8 investigate?
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The effect of light or gravity on the growth of newly germinated seedlings.
In the seedling tropism practical, how should results be recorded?
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As length measurements and as careful, labelled biological drawings.
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