Q. No.The 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
(1) Endodermis of root
(2) Starch sheath
(3) Inner layer of cortex
(4) All of these
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.
Root pressure
(1) Pushing pressure
(2) Negative pressure
(3) Tries to cope up with water requirement of well heighted plants
(4) Effects are observed at day time and evening time
Transpiration can be studied by
(1) Cobalt chloride paper test
(2) Chromium chloride paper test
(3) Leaf enclosed in polybag
(4) Both A and C
The inner wall of guard cell is not
(1) Thin
(2) Elastic
(3) Towards the pore or stomatal aperture
(4) All of these
Transpiration is affected by external factors
Find the wrong one.
(1) Temperature, Light
(2) Humidity
(3) Wind Speed
(4) Canopy structure
Transpiration is affected by internal factors
Find the wrong one
(1) Number of stomata
(2) Water status of plant
(3) Percent of open stomata
(4) Wind speed
Capillarity is not aided by
(1) Cohesion
(2) Adhesion
(3) Tensile strength
(4) Small diameters of the tracheary elements- the tracheids and vessels
The forces which are generated in xylem by transpiration pull can cause lifting of water up to
(1) 110 metres
(2) 13 metres
(3) 130 metres
(4) 19 metres
Evaporation from the leaf at first sets up a pressure gradient between the
(1) Outside air and cytoplasm of cells of leaf
(2) Outside air and air spaces of the leaf
(3) Outside air and xylem cells of the leaf
(4) Outside air and palisade cells of leaf
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