OCR A2 Biology: Plant Hormones

What is abiotic stress?

What is a tropism?

What is a positive tropism?

Whats is a negative tropism?

What is phototropism?

Are shoots positively or negatively phototrophic?

Are roots positively or negatively phototrophic?

What are growth hormones?

Where are growth hormones produced?

1. Where are auxins produced?
2. What do they do?

What is elongation?

What happens if the shoot tip is removed?

What happens in high concentration of auxins?

How do auxins move around the plant?

What is Indoleacetic acid (IAA)?

What is apical dominance?

Why is apical dominance present in flowering plants?

What happens when you remove the apical bud?

What are Gibberellins?

What do Gibberellins stimulate?

What is a difference between auxins and gibberellins?

Why can auxins and Gibberellins be synergistic?

How can auxins and Gibberellins be antagonistic?

What are deciduous plants?

Why do deciduous plants lose their leaves?

What triggers leaf loss?

What hormones effect leaf loss?

How does Ethene promote leaf loss?

How is Ethene used commercially?

How are Auxins and Gibberellins used commercially?