What are the characteristics of phloem?
Which of the following is made up of dead cells?
What is difference between transportation and translocation?
What are the 3 main types of plant tissue?
In phloem transport, the source-sink relationship is variable. Identify the incorrect statement in support of this.
Food is primarily transported through phloem
Sugar stored in roots may be mobilized to buds in early spring
The direction of movement in phloem can be upwards or downwards i.e., bidirectional
Movement of pholem sap is always downwards
Statement 2: Translocation in phloem is bidirectional.
- Statement 1 and Statement 2 are correct
- Statement 1 and Statement 2 are wrong
- Statement 1 is correct and Statement 2 is wrong
- Statement 1 is wrong and Statement 2 is correct
Is phloem fibre a dead or living tissue?
Which Tissue Is Present in Veins of Leaves?
- Marcello Malpighi
- Ernst Munch
- Jan Ingenhousz
- Dixon and Jolly
- Water and sucrose
- Sugars and hormones
- Sucrose and amino acids
- Minerals and sugars
Reason: Turgor pressure helps in the movement of sap through the phloem.
- Both A and R are correct. But R is not the correct explanation of A
- Only A is correct
- A is correct and R is the correct explanation of A
- Both A and R are incorrect
Transportation of food in plants is also called translocation.
The phloem fibres are also called _____.
- Supplies water for photosynthesis
- Helps in translocation of sugars from source to sink
- Cools leaf surface
- Transports minerals from the soil to all parts of the plant.
- Both the shoot and root of a ring girdled plant die together.
- The root of the plant dies first followed by the shoot.
- The shoot of the plant dies first followed by the root.
- Neither the root nor the shoot will die.
Assertion: Transpiration lowers down plant temperature.
Reason: Transpiration reduces the concentration of mineral salts.
Diffusion participates in which of the following processes
Exit of water vapour from leaves during transpiration
All the above
Entry of CO2 into leaves during photosynthesis
Dissolution of KMNO4 crystal in water
Phloem helps in the upward conduction of water.
Phloem is a vessel in plants which carries
food and minerals to leaves from roots
prepared food to other parts from roots
food and minerals to roots from leaves
prepared food to other parts from leaves
(b) Draw a labelled diagram of cross section of leaf.
(c) Explain the transportation of food and other substances in plants.
Absorption of water by plants also depends on transpiration.
- Tying a metallic ring to a stem
- Marking a ring shaped area on the stem
- Removal of a ring of tissue external to xylem
- None of the above.