Worksheets03 Plants 2
Total questions: 20
Worksheet time: 25mins
Movement of water through a plant and evaporation
from leaves, stems and flowers is Translation.
True
False
Water molecules attracted to each other to move up the plant.
Cohesion
Transpiration
Adhesion
Capillary Action
Root Pressure
HOW IS WATER TRANSPORTED UP THE PLANT?
Cohesion
Translation
Adhesion
Capillary Action
Root Pressure
Minerals are actively moved (takes energy)
into the root cells and Osmotic pressure increases in the cell which begins to force water upwards
Cohesion
Translation
Adhesion
Capillary Action
Root Pressure
Capillary Action... (check all that apply)
takes place because of adhesion of water molecules and walls of xylem
Transpiration is the evaporation of water vapour from plant
leaves via the stomata
walls are closer together and water and dissolved minerals move up the xylem
water is POLAR, the water molecules in the xylem are connected by COHESIVE FORCES
root pressure (in roots) and capillary action (in stem) allow water and minerals to go up
Label "A"
Leaf - evaporation from stomata
Water potential gradient
Xylem - cohesion & adhesion
Roots - Osmosis into root hairs
None of the above
Label "C"
Leaf - evaporation from stomata
Water potential gradient
Xylem - cohesion & adhesion
Roots - Osmosis into root hairs
None of the above
The process of transporting sugar and other organic
materials through the phloem of the plant is Translocation.
True
False
What is happening at " 1 "
Sugar is actively loaded into phloem tubes at the source.
Water flows into phloem passively, down its concentration gradient, increasing the water pressure.
Sugar moves into sink cell.
Water flows out of the phloem tube passively, down its concentration gradient, decreasing the water pressure.
What is happening at " 3 "
Sugar is actively loaded into phloem tubes at the source.
Water flows into phloem passively, down its concentration gradient, increasing the water pressure.
Sugar moves into sink cell.
Water flows out of the phloem tube passively, down its concentration gradient, decreasing the water pressure.
Major site of photosynthesis in the leaves
Palisade
translocation & transpiration
flowers, fruits, roots
xylem & phloem
Spongy Mesophyll
One can distinguish spring xylem from summer xylem by the fact that spring xylem cells are _ _ .
longer than summer xylem
larger in diameter than summer xylem
smaller in diameter than summer xylem
living, whereas summer xylem cells are not
None of the above
Label A
Pith
Epidermis
Phloem & Xylem
interfascicular parenchyma
Vascular bundle
Label G
Pith
Epidermis
Phloem & Xylem
interfascicular parenchyma
Vascular bundle
Adhesion of water to cell surfaces is one of the factors involved in _ _ .
translocation of sugars in phloem
active transport in sieve tube cells
root pressure
the rise of water in stems
All the above
Aphids have been useful in helping scientists explain _ _ .
sugar translocation
active transport in sieve tube cells
leaf pull
The rate of transpiration in trees is dependent on _ _ .
air temperature
humidity
wind velocity
All of the above
Which of the following statements is true regarding the rise of water in plants?
Plants must expend energy to move water from the ground to the leaves
The ascent of water is fastest when the stomata are closed.
The ascent of water is fastest at night.
Transpiration is required to lift water to the tops of tall plants.
The fact that root pressure cannot be demonstrated in some plants indicates
that it does not exist
it is not a major factor in moving up plants
it is the main force causing water to rise in plants
that roots may not be involved in moving water up plants
In the Pressure Flow Theory, the “sink” is most likely to be
leaf mesophyll tissue
sieve tube cells
vessel cells
None of the above
