Lesson 4.4.3
4.4.3 Cellulose microfibrils and xylem, phloem and sclerenchyma Quiz: Pearson Edexcel Biology, Unit 4
20 questions
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Lesson 4.4.3, Cellulose microfibrils and xylem, phloem and sclerenchyma: 20 multiple choice questions for the Pearson Edexcel Biology (9BI0), Unit 4: Biodiversity and Natural Resources, written with Revision Ninja.
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The 20 questions
-
Which tissue transports water and mineral ions through a plant stem?
- Phloem
- Sclerenchyma
- Xylem
- Epidermis
-
Which tissue carries organic solutes such as sucrose?
- Cortex
- Phloem
- Sclerenchyma
- Xylem
-
Which structural feature is characteristic of mature xylem vessel elements?
- Companion cells
- Lignified cell walls
- Living cytoplasm
- Sieve plates
-
What structures are found at the end walls of phloem sieve tube elements?
- Lignified rings
- Sieve plates
- Plasmodesmata plugs
- Pit membranes
-
What is the primary function of sclerenchyma fibres in plant stems?
- Sugar translocation
- Mechanical support
- Water transport
- Photosynthesis
-
What main function does secondary thickening provide to xylem vessels and sclerenchyma?
- Mechanical support
- Sugar transport
- Cell division
- Water absorption
-
Which phloem cells are living cells that support adjacent sieve tube elements?
- Xylem parenchyma
- Guard cells
- Companion cells
- Sclerenchyma fibres
-
Which structural feature allows mass flow of sap between adjacent sieve tube elements?
- Pits
- Casparian strips
- Lignified rings
- Sieve plates
-
In a light microscope section of stem, a cell with thick, lignified walls and no cytoplasm is:
- A palisade cell
- A xylem vessel
- A sieve tube
- A companion cell
-
Which tissue consists of dead, thick-walled cells near the outer stem providing support?
- Parenchyma
- Phloem
- Xylem
- Sclerenchyma
-
What accumulates immediately above a ring cut that removes phloem from a plant stem?
- Sucrose
- Water
- Inorganic ions
- Lignin
-
Which plant tissue provides the main resistance to bending forces in stems?
- Sclerenchyma
- Phloem
- Epidermis
- Parenchyma
-
How do mature xylem vessels compare to mature sieve tube elements regarding viability?
- Both are dead
- Xylem is dead
- Both are living
- Phloem is dead
-
How do layered cellulose microfibrils in cell walls strengthen xylem vessels?
- Resist tension
- Allow translocation
- Store starch
- Prevent osmosis
-
Which two variables must be measured to test if sclerenchyma affects stem flexibility without altering water transport?
- Stomatal density
- Bending and flow
- Transpiration rate
- Height and mass
-
Which organelle is missing in mature sieve tube elements, requiring companion cell support?
- Cell membrane
- Cytoplasm
- Nucleus
- Cell wall
-
Which substance impregnates xylem cell walls to prevent vessel collapse under negative pressure?
- Pectin
- Lignin
- Callose
- Suberin
-
What advantage does increased xylem lignification provide to plants in windy environments?
- Increased nutrient uptake
- Bending resistance
- Higher transpiration
- Reduced water loss
-
What main advantage does sclerenchyma located near the outer stem edge provide compared to central xylem?
- Transporting water
- Resisting bending
- Translocating sucrose
- Storing starch
-
What feature of sieve plates enables continuous sap transport through phloem tissue?
- Lignified walls
- Tight junctions
- Waterproof wax
- Perforated pores
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