Biology (Separate Science) · GCSE · AQA · AQA GCSE Biology - Higher Tier - (8461) · Specification point · 4.5.4.1 · Homeostasis and response · Plant hormones (biology only)
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4.5.4.1 Control and coordination
| Content | Key opportunities for skills development |
|---|---|
Plants produce hormones to coordinate and control growth and responses to light (phototropism) and gravity (gravitropism or geotropism). Unequal distribution of auxin causes unequal growth rates in plant roots and shoots. |
(HT only) Gibberellins are important in initiating seed germination.
(HT only) Ethene controls cell division and ripening of fruits.
(HT only) The mechanisms of how gibberellins and ethene work are not required.
Required practical activity 8: investigate the effect of light or gravity on the growth of newly germinated seedlings.
Record results as both length measurements and as careful, labelled biological drawings to show the effects.
AT skills covered by this practical activity: AT 1, 3, 4 and 7.
This practical activity also provides opportunities to develop WS and MS. Details of all skills are given in Key opportunities for skills development.