Discussion
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- Question
The cohesion-tension theory of water movement helps to explain how water moves from soil into root?
Options- A. Through the phloem
- B. From leaf to root
- C. Through the xylem
- D. Into the guard cells
- Correct Answer
- Through the xylem
- 1. When guard cells swell
Options- A. stomata close
- B. stomata open
- C. photosynthesis stops
- D. evaporation stops Discuss
- 2. Water moves into roots of plants by
Options- A. osmosis
- B. active transport
- C. diffusion
- D. pressure flow mechanism Discuss
- 3. The movement of most minerals, including potassium into root cells is by
Options- A. osmosis
- B. diffusion
- C. bulk flow
- D. active transport Discuss
- 4. A widely accepted explanation for transport of sugar in phloem is called
Options- A. root pressure theory
- B. transpiration
- C. pressure flow hypothesis
- D. cytoplasmic streaming Discuss
- 5. Normally CO2 and O2 enter a plant by
Options- A. osmosis
- B. active transport
- C. diffusion
- D. evaporation Discuss
- 6. The evaporation of water from leaves is called
Options- A. transpiration
- B. cohesion
- C. tension
- D. pressure flow Discuss
- 7. Phloem is composed of
Options- A. vessel elements and companion cells
- B. tracheids and vessel elements
- C. sieve-tube elements and companion cells
- D. tracheids and sieve-tube elements Discuss
- 8. Cell fusion method includes the preparation of large number of
Options- A. plant cells stripped of their cell wall
- B. single plant cell stripped of their cell wall
- C. plant cells with cell wall
- D. cells from different species Discuss
- 9. Which of the following is considered as the disadvantage of conventional plant tissue culture for clonal propagation?
Options- A. Multiplication of sexually derived sterile hybrids
- B. Less multiplication of disease free plants
- C. Storage and transportation of propogates
- D. Both (b) and (c) Discuss
- 10. Protoplasts can be produced from suspension cultures, callus tissues or intact tissues by enzymatic treatment with
Options- A. cellulotyic enzymes
- B. pectolytic enzymes
- C. both cellulotyic and pectolytic enzymes
- D. proteolytic enzymes Discuss
Transport of Molecules in Plant problems
Search Results
Correct Answer: stomata open
Correct Answer: osmosis
Correct Answer: active transport
Correct Answer: pressure flow hypothesis
Correct Answer: diffusion
Correct Answer: transpiration
Correct Answer: sieve-tube elements and companion cells
Correct Answer: single plant cell stripped of their cell wall
Correct Answer: Storage and transportation of propogates
Correct Answer: both cellulotyic and pectolytic enzymes
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