Transport in Plants - Online Test
Q1. Pinus seeds cannot germinate without
Answer : Option C
Explaination / Solution:
The fungus provides minerals and water to the roots, inturn the roots provide sugars and N-containing compounds to themycorrhizae. Some plants have an obligate association with themycorrhizae.
Q2. Cohesion-tension theory is related to
Answer : Option D
Explaination / Solution:
The process of movement of water and minerals from roots to leaves in plant through xylem tissues is called ascent of sap. The most accepted theory of ascent of sap is cohesion-tension theory.
Q3. The excess water collected in the form of droplets around special openings of veins near tip of leaves is called as
Answer : Option B
Explaination / Solution:
The excess water collects in the form of droplets around special openings of veins near the tip of grass blades, and leaves of many herbaceous parts. Such water loss in its liquid phaseis known as guttation.
Q4. The neighbouring cells are connected through cytoplasmic strands that extend through
Answer : Option A
Explaination / Solution:
Neighbouring cells are connected through cytoplasmic strands that extend through plasmodesmata. During symplastic movement, the water travels through the cells – their cytoplasm; intercellular movement is through the plasmodesmata.
Q5. Transport over longer distances proceeds through the vascular system
Answer : Option B
Explaination / Solution:
Translocation is a biological process that occurs in all plants and involves the movement of water and other soluble nutrients through the xylem and phloem from one part of the plant to another.
Q6. A cell dipped in 0.5 M sucrose has no effect. It is dipped in 0.5 M NaCl, the cell will
Answer : Option A
Explaination / Solution:
A cell dipped in 0.5 M sucrose has no effect due to osmosis as concentration of sucrose is more of equal to cytoplasm but 0.5 M NaCl cause exosmosis that leads to plasmolysis.
Q7. Rupture and fractionalization of water column present in treachery elements does not occur during ascent of sap due to
Answer : Option A
Explaination / Solution:
Cohesion and adhesion between wall of tracheid and water molecule prevent rupture and fractionalization of water column present in treachery elements during ascent of sap.
Q8. The system of adjacent cell walls that is continuous throughout the plant is called as
Answer : Option C
Explaination / Solution:
The apoplastis the system of adjacent cell walls that iscontinuousthroughout the plant, except at the casparianstrips of the endodermis in the roots. The apoplastic movement of water occurs exclusively through the intercellular spaces and the walls of the cells.
Q9. Bulk flow can be achieved by
Answer : Option C
Explaination / Solution:
Bulk flow can be achieved either through a positive hydrostatic pressure gradient (e.g., a garden hose) or a negative hydrostatic pressure gradient (e.g., suction through a straw).
Q10. During symplastic movements, the water travels through
Answer : Option B
Explaination / Solution:
During symplastic movement, the watertravels through the cells – their cytoplasm; intercellular movement isthrough the plasmodesmata. Water has to enter the cells through the cell membrane; hence the movement is relatively slower.
