In mycorrhiza, fungal filaments help in
1. Water absorption
2. Food translocation
3. Developing tension in xylem
4. Development of root pressure
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMost 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhat is true for both symplast and apoplast movement of water in plants?
1. An equal rate of transport
2. Being down a potential gradient
3. Assistance by cytoplasmic streaming
4. Conduction through interconnected protoplasts
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMovement of molecule across a typical plant cell i.e. 50 micrometer takes
(1) 10 seconds
(2) 15 seconds
(3) 2.5 seconds
(4) 16 seconds
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyPinus 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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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyFrom the twig experiment in which twig is placed in colored water, which of the following can be deduced?
(1) The path of organic Acid
(2) The path of hormones
(3) The path of water
(4) The development of twig
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologySelect the incorrect about apoplast pathway.
1. It is faster than symplast
2. Little resistance in the movement of water
3. Consists of living parts of the plant body
4. Water moves through cell walls and intercellular spaces
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyHow many are associated with apoplastic movement of water?
1. Through cell wall
2. Through intercellular space
3. Through plasmodesmata
d. Through xylem
1. a, b, & d
2. b, c & d
3. a, c & d
4. a, b & c
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe movement of water through apoplast stops at the level of ……..And crosses membrane to undergo symplast till xylem cells
(1) Endodermis of root
(2) Starch sheath
(3) Inner layer of cortex
(4) All of these
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich of the following statements is not correct?
(1) Some ions also move in epidermal cells passively
(2) The active uptake of ions is partly responsible for the water potential gradient in the roots.
(3) Uptake of water by the roots is through osmosis
(4) Transport proteins of pericycle are control points where a plant adjusts the quantity and types of solute which will cross the cell membrane
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology