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Total questions: 15
Worksheet time: 9mins
Select the correct term for the following definition:
"The nutrient transport system in plants."
Enzyme
Guard cells
Phloem
Proteins
Recall the main funtion of a phloem cell.
To transport nutrients (mainly sucrose) to different parts of a plant.
To transport water to different parts of a plant.
To make energy for the plant via photosynthesis.
To provide structural support to a plant.
Recall which of the following form part of the phloem.
Sieve-tube elements
Trachieds
Vessels
Companion cells
Recall that the movement of food in the phloem is called.
Translocation
Transpiration stream
Evaporation
Respiration
Structure of phloem consists all below, except?
Sieve tube element
Tracheids
Companion cell
Sieve plate
Cells which transport assimilates in the plant are called ..........?
Inorganic
sieve elements
key elements
phloem elements
What is the most abudant solute in phloem sap?
amino acids
hormones
sucrose
minerals
What is the best words to describe sugar source and sugar sink
Both are plants organ and act as storage
Sugar sink can be either roots, fruit or mature leaves and sugar source is shoots
Sugar source act as site for sugar production and sugar sink will store sugar
Companion tube carry food from a sugar source to a sugar sink
Movement of sugar from source to other parts of plant is acheieved through...?
active transport
diffusion
mass flow
capillary action
All events below occurs in sink tissue, except
Water potential increases
Water enters sieve elements from xylem
Higher(+ve) solute potential
Phloem turgor pressure decrease
What is the form of sugar being move to companion cells?
glucose
maltose
sucrose
starch
Why would the roots die without translocation?
They would get no water
They would get no oxygen and carbon dioxide
They would get no sugars from the leaves to survive
They would rot
Movement of sugar from source to other parts of plant is assist by
active transport
diffusion
endosmosis
capillary action
The mass flow theory is best defined as the idea that
sucrose is transported due to a negative pressure in a source
large volumes of solution are transported from an area of high hydrostatic pressure
water travels from a high to low concentration
sucrose diffuses to all cells equally
How is facilitated diffusion of sucrose into a companion cell achieved?
by active transport of H+ ions to create a proton gradient and co transport back into companion cells
By active transport of sucrose to create a diffusion gradient
By diffusion of H+ ions into the phloem taking sucrose with them
By osmosis of water to change the water potential
