Upward Movement of Water in Plants (Leaving Cert Biology): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
How does water initially enter plant roots to create root pressure?
How does water initially enter plant roots to create root pressure?
By osmosis
Why is root pressure alone insufficient for tall trees?
Why is root pressure alone insufficient for tall trees?
Not strong enough for great heights
What is guttation?
What is guttation?
Water droplets on leaf edges
Who first proposed the cohesion-tension theory in 1894?
Who first proposed the cohesion-tension theory in 1894?
Henry Dixon and John Joly
What is cohesion in water transport?
What is cohesion in water transport?
Water molecules sticking together
What is adhesion in water transport?
What is adhesion in water transport?
Water sticking to xylem walls
What maximum plant height can the cohesion-tension theory explain?
What maximum plant height can the cohesion-tension theory explain?
150 metres
What creates the pulling force in the cohesion-tension theory?
What creates the pulling force in the cohesion-tension theory?
Transpiration from leaves
What happens to stem width during active daytime transpiration?
What happens to stem width during active daytime transpiration?
Stems become slightly narrower
What state are guard cells in when a stoma is open?
What state are guard cells in when a stoma is open?
Turgid
What state are guard cells in when a stoma is closed?
What state are guard cells in when a stoma is closed?
Flaccid
What effect does high CO₂ concentration have on stomata?
What effect does high CO₂ concentration have on stomata?
Stomata close