Transport System Role and Structure (OCR A-Level Biology A): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
Why is glucose transported as sucrose in plants?
Why is glucose transported as sucrose in plants?
Sucrose is non-reducing & less reactive
Which transport system moves materials bidirectionally in plants?
Which transport system moves materials bidirectionally in plants?
Phloem
Which feature increases plant surface area for absorption?
Which feature increases plant surface area for absorption?
Root hairs extending from root surfaces
In dicot stems, how are vascular bundles arranged?
In dicot stems, how are vascular bundles arranged?
Ring; xylem inside, phloem outside
What key feature of xylem vessel elements reduces water flow resistance?
What key feature of xylem vessel elements reduces water flow resistance?
Dead cells with no cytoplasm
What is the function of lignin in xylem cell walls?
What is the function of lignin in xylem cell walls?
Strengthens walls & provides support
Which lignin pattern allows xylem vessels to stretch as plants grow?
Which lignin pattern allows xylem vessels to stretch as plants grow?
Spiral & ring thickening
What cellular features do sieve tube elements lack?
What cellular features do sieve tube elements lack?
Nucleus & most organelles
What is the main role of companion cells?
What is the main role of companion cells?
Supply proteins & ATP to sieve tubes
What are plasmodesmata?
What are plasmodesmata?
Channels connecting cell cytoplasm