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WorksheetsHormone & Transportation System in Plants
Total questions: 10
Worksheet time: 5mins
What triggers the opening of stomata in plant leaves?
Increased levels of carbon dioxide
Decreased levels of oxygen
Presence of sun light
High humidity levels
What is the primary force responsible for the movement of water through the xylem in the
cohesion-tension model?
Root pressure
Capillarv action
Cohesion between water molecules
Active transport by cells
There are 2 pathways of water and mineral
uptake. There's pathway A, which is between
porous cell walls and there's pathway B which is….
through cells across the cortex and enderdemis.
outside cell walls
through air inside the soil.
through water across the soil.
Which one used to transport water?
xylem
phloem
pericycle
cortex
Where is auxin produced?
root tips
style
petriole
shoot apical meristem
What is the lon required for the opening and
closing of stoma?
Ca2+
Mg2+
Na+
K+
What radioactive substance is used to study the transportation of organic nutrients from source to sink?
Carbon-12
Sodium-24
Carbon-14
Phosphorus-32
What is the reason organic nutrients are not
transported passively?
Longer time taken
Due to gravity
The distance between source and sink is far
The pressure-flow model cannot transportsThe pressure-flow model cannot transports
organic substance via simple osmosis like water
which hormone prevent aging of plant?
cytokinin
auxin
ethylene
antidiuresis
which hormone closes stomata?
adrenaline
abscicic acid
cytokinin
oxytocin
