Upward Movement of Water in Plants (Leaving Cert Biology): Quizzes
📚Quizzes
Practise the questions
13 questions from this quiz
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Practise the questions
13 questions from this quiz
What process causes water to enter plant roots and create root pressure?
What process causes water to enter plant roots and create root pressure?
Osmosis
When is root pressure particularly weak despite high water transport occurring?
When is root pressure particularly weak despite high water transport occurring?
During summer
What is the term for water droplets appearing on leaf edges due to root pressure?
What is the term for water droplets appearing on leaf edges due to root pressure?
Guttation
Who first proposed the cohesion-tension theory in 1894?
Who first proposed the cohesion-tension theory in 1894?
Henry Dixon and John Joly
What does cohesion mean in the cohesion-tension theory?
What does cohesion mean in the cohesion-tension theory?
Water molecules sticking to each other
What does adhesion refer to in water transport?
What does adhesion refer to in water transport?
Water sticking to xylem vessel walls
How tall can plants be for the cohesion-tension theory to explain water movement?
How tall can plants be for the cohesion-tension theory to explain water movement?
Up to 150 metres tall
What happens to stem width during daytime when transpiration is active?
What happens to stem width during daytime when transpiration is active?
Stems become slightly narrower
What happens to stems at night when stomata close?
What happens to stems at night when stomata close?
Stems return to normal width
What happens when guard cells become turgid?
What happens when guard cells become turgid?
They buckle outwards and stoma opens
What happens when guard cells lose water and become flaccid?
What happens when guard cells lose water and become flaccid?
They shrink and stoma closes
What happens to stomata when concentration is high in leaf air spaces?
What happens to stomata when concentration is high in leaf air spaces?
Stomata close
What happens to stomata when concentration is low in leaf air spaces?
What happens to stomata when concentration is low in leaf air spaces?
Stomata open