Transport Systems in Plants (HSC SSCE Biology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
How many essential features do all effective transport systems share?
How many essential features do all effective transport systems share?
Three
What does xylem tissue transport from roots to leaves?
What does xylem tissue transport from roots to leaves?
Water and mineral ions
What is the main purpose of lignin thickenings in xylem vessel walls?
What is the main purpose of lignin thickenings in xylem vessel walls?
To prevent vessel collapse
What happens to the end walls of cells when xylem vessels develop?
What happens to the end walls of cells when xylem vessels develop?
They break down completely
What creates the pulling force in the transpiration-cohesion-tension theory?
What creates the pulling force in the transpiration-cohesion-tension theory?
Evaporation of water from leaves
Why do water molecules show cohesion in xylem vessels?
Why do water molecules show cohesion in xylem vessels?
They are polar molecules
Which cell type contains a nucleus and supports sieve tube cells in phloem?
Which cell type contains a nucleus and supports sieve tube cells in phloem?
Companion cells
What percentage of dissolved substances in phloem sap is sucrose?
What percentage of dissolved substances in phloem sap is sucrose?
Up to 90%
In which direction can phloem transport substances?
In which direction can phloem transport substances?
Any direction as required
What is the key structural difference between xylem and phloem tissue?
What is the key structural difference between xylem and phloem tissue?
Xylem is dead, phloem is living