GCSE Biology OCR B J257

B4.4: How is plant growth controlled?

#B4.4.1

a) explain how plant hormones are important in the control and coordination of plant growth and development, with reference to the role of auxins in phototropisms and gravitropisms

b) describe practical investigations into the role of auxin in phototropism PAG6

#B4.4.2

**describe some of the variety of effects of plant hormones, relating to gibberellins and ethene **

#B4.4.3

**describe some of the different ways in which people use plant hormones to control plant growth **

B4.3

How do organisms grow and develop?

B4.5

Should we use stem cells to treat damage and disease?

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