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WorksheetsA Level Biology C7 Recap
Total questions: 20
Worksheet time: 20mins
What is the main photosynthetic organ of a plant?
Root
Stem
Flowers
Leaves
Which tissue(s) make up the vascular system in plants (choose all that apply)?
Collenchyma
Phloem
Xylem
Sclerenchyma
Which of the following is TRUE regarding the vascular system in plants?
Xylems carry photosynthetic products from the leaves
Xylem sap can only move in one direction
Phloem sap can move in two directions in the same tube
Phloems carry water and inorganic ions from the roots
Which of the following is NOT a main organ involved in transport in plants?
Flowers
Roots
Stem
Leaves
Which cell type in plants has thicker cell walls with extra cellulose that provide support and strength and can often be found in the midrib of leaves?
Parenchyma
Collenchyma
Endodermis
Sclerenchyma
Label the following structures in the provided image of a plant stem.
Plants lose water vapour via stomata on the underside of leaves. This water then enters the environment. What is this process called?
Evaporation
Condensation
Transpiration
Guttation
Describe how transpiration creates a water potential gradient in the plant leading to the uptake of water by the roots from the surrounding soil.
In the (a) pathway, water moves from cell to cell via plasmodesmata, while water moves via cell walls in the (b) pathway.
Which of the following is FALSE regarding the xylem vessel?
It is made of xylem vessel elements joined end to end
Xylem vessel elements are living cells
Lignin is deposited in the walls of xylem vessel elements
Lignin is not deposited around plasmodesmata, forming pits in xylem vessels
Movement of water in a xylem vessel is aided by (a) , which is the attraction of water molecules to one another, as well as (b) , which is the attraction of water molecules to the cell walls of the xylem vessel.
Root hairs absorb water from the surrounding soil. Root hairs are extensions of which structure in the root?
Xylem vessel
Cortex
Endodermis
Epidermis
Label the following structures in the following image of a root cross section.
Which of the following is FALSE regarding the movement of water in plant roots?
Water can move across plant cells in the root via both the symplast and apoplast pathways
A thick band of suberin can form a Casparian strip in endodermis cells
The Casparian strip blocks the apoplast pathway in the endodermis
The Casparian strip dissolves in older cells
Which of the following is TRUE regarding assimilation?
Utilisation of nitrates from soil to make amino acids is an example of assimilation
Photosynthesis and assimilation are different processes
Assimilation breaks down organic compounds to inorganic nutrients
Assimilation does not require energy
Sources produce assimilates, which are then transfers to sinks for growth, development, or storage. Which of the following are examples of a sink (choose all that apply)?
Flowers
Buds
Roots
Fruits
Which of the following organelles is NOT present in a phloem sieve tube element?
Nucleus
Cell wall
Mitochondria
Endoplasmic reticulum
In xylem vessels, the movement of water is passive. However, movement of assimilates in phloem requires energy. Which process requires energy?
Movement of sucrose into companion cells from source cells
Movement of hydrogen ions into the companion cell wall
Movement of hydrogen ions into companion cell cytoplasm
Movement of sucrose into phloem from companion cells
The following image shows the cross section of a phloem. What is the name of this structure?
Phloem plate
Phloem filter
Sieve plate
Sieve filter
On the image below, draw the direction of water (3 arrows) and sucrose (1 arrow) movement.
