Tropic responses

What the syllabus asks of you

• Describe gravitropism as a response in which 4 Explain phototropism and gravitropism of a parts of a plant grow towards or away from shoot as examples of the chemical control of gravity plant growth
• Describe phototropism as a response in which 5 Explain the role of auxin in controlling shoot parts of a plant grow towards or away from the growth, limited to: direction of the light source (a) auxin is made in the shoot tip
• Investigate and describe gravitropism and (b) auxin diffuses through the plant from the phototropism in shoots and roots shoot tip (c) auxin is unequally distributed in response to light and gravity (d) auxin stimulates cell elongation