Q. No.Apoplast movement
Find the wrong one.
(1) Dependent on gradient
(2) Water movement is through mass flow
(3) The continuous stream of water gets tension when water is absorbed by root hairs
(4) Mass flow of water occurs due to adhesive and cohesive properties of water
(1) Dependent on gradient
(2) Water movement is through mass flow
(3) The continuous stream of water gets tension when water is absorbed by root hairs
(4) Mass flow of water occurs due to adhesive and cohesive properties of water
Symplastic system
Find the wrong one.
(1) System of interconnected protoplasts
(2) Involves path through plasmodesmata
(3) Water has to enter the cells through the cell membrane
(4) Above a potential gradient movement
Symplastic movement is slower than apoplastic movement
(1) Because it involves cytoplasmic streaming always
(2) Molecule has to enter through the cell membrane
(3) Because it is down the gradient
(4) All of these
Most of the water flow in the roots occur via the………
(1) Apoplast
(2) Symplast
(3) Active transport
(4) Imbibition
Most of the movement in roots through apoplast is due to
(1) Cortical cells are loosely packed and hence no resistance to water movement
(2) Endodermal cells are loosely packed and hence no resistance to water movement
(3) Pericycle cells are loosely packed and hence no resistance to water movement
(4) Medullary cells are loosely packed and hence no resistance to water movement
Casparian strip makes
(1) Endodermis impervious
(2) Inner layer of cortex impervious
(3) Outer layer pervious
(4) More than one option is correct
The movement of water through apoplast stops at the level of ……..And crosses membrane to undergo symplast till xylem cells
(1) Endodermis
(2) Starch sheath
(3) Inner layer of cortex
(4) All of these
The path of water in xylem vessels and tracheids is
(1) Symplast
(2) Apoplast
(3) Both A and B
(4) Depends on gradient
Mycorrhiza
Find the incorrect statement.
(1) Symbiotic association of fungus with root system
(2) Fungal hyphae have a very large surface area that absorb mineral ions and water from the soil
(3) Hyphae can go to downwards in depth and cause absorption of much larger volume of soil that perhaps a root cannot do
(4) Roots provide sugar and S containing compounds to the mycorrhizae
Pinus has an/a…….. association with mycorrhizae and their …….. without the presence of mycorrhizae.
(1) Obligate, seeds cannot germinate
(2) Facultative, fruits cannot disperse
(3) Obligate, roots can not spread down the soil
(4) Facultative, leaves cannot perform photosynthesis.
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