Q. No.Movement 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
1. 10 seconds
2. 15 seconds
3. 2.5 seconds
4. 16 seconds
If mass flow is occurring like suction through a straw
1. It is due to positive hydrostatic pressure
2. It is due to negative hydrostatic pressure
3. It is due to concentration gradient
4. All of these
Xylem transports from roots to the aerial parts of the plants
1. Water, mineral salts
2. Some organic Nitrogen
3. Inorganic solutes, Hormones
4. All of these
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
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
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