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WorksheetsTransport in Plants- Quiz No. 8
Total questions: 12
Worksheet time: 4mins
Seeds when soaked in water, they imbibe it because of –
O.P inside the seed is low
OP of water is high
DPD of seed is very much low
Water potential gradient between the seed coat and water
Which one is not true?
The symplast is a meshwork consisting of (connected) living cells
The casparian strips prevent water from moving between endodermal cells
Water can move freely in the apoplast from cortical area to xylem of root
All
Guttation is most commonly observed under condition of –
High atmospheric humidity and plentiful soil water
Low atmospheric humidity and little soil water
High atmospheric humidity but little soil water
Low atmospheric humidity but plentiful soil water
To develop root pressure, energy is used to –
Actively transport minerals into root cells
Evaporate water in the leaves
Condense water in the xylem
Create suction in the xylem
The lowest water potentials in the xylem are in the –
root hairs
Vascular cylinders of root
tracheids of the stem
leaves
The last thing all water and solute molecules must pass through before they can enter the vascular system and move upward to leaves is –
Endodermis
Stoma
Epidermis
Root hair
A student is performing a chemical analysis of xylem sap. This student should not expect to find much of –
Nitrogen
Sugar
P
Water
Which one(s) aids(s) stomatal movement –
Heterogenous nature of cell wall
Unique shape of guard cell
Radial orientation of cellulosic microfibrils in the guard cell
All
Which one is correct –
Unlike water all minerals cannot be passively absorbed by roots
Most of the minerals enter the root by active transport
Ions are absorbed from soil by both passive and active transport
All
The translocation of organic solutes through phloems is bidirectional because –
Root acts as source and leaf acts as sink
Source and sink irreversed in any season
Translocation is ATP regulated process
Source-sink relationship is variable depending upon season or needs of plant
Where are the proton pumps responsible for phloem loading located?
on the membrane of companion cell
On the membrane of sieve tube
On the membranes of root cell
On the membranes of root hair
Resistance to water flow in the root cortex is higher for –
apoplastic pathway
symplastic pathway
both have the same
None
