Transportation in Plants
The process of carrying food from the leaves to other parts of a plant is called :
- These are the only epidermal cells that contain chloroplasts.
- Guard cells can undergo rapid turgor changes.
- The opening and closing of the stomatal pore is a function of guard cells.
- Their outer and lateral walls are comparatively thicker than inner wall.
Transport of food from the leaves to other parts of the plants is called:
Why is it important to the plant that phloem moves both up and down?
(a) Why is transport of materials necessary in an organism (plant or animal)?
(b) What is the need of special tissues or organs for transport of substances in plants and animals ?
(c) How are water and minerals transported in plants ?
(d) How is food transported in plants ?
Why do plants use a relatively slow transport system?
What is the name of tissues which transport :
(a) food in a plant ?
(b) water and minerals in a plant ?
How are water and minerals transported in plants?
The concentration of mineral nutrient elements is higher elements is higher inside the root-hairs than in the surrounding soil. How do roots take them in from the soil?
The transport system in plants consists of two kinds of tissues X and Y. The tissue X is made up of living cells and consists of two components A and B. The component A has tiny pores in its end walls and contains only cytoplasm but no nucleus. On the other hand, component B has cytoplasm as well as nucleus. The tissue Y is made up of dead cells and consists of two components C and D. The component C has open ends whereas component D does not have open ends. In flowering plants, either only C or both C and D transport water but D is the only water conducting tissue in non-flowering plants.
(a) What is (i) tissue X (ii) component A, and (iii) component B?
(b) What is (i) tissue Y (ii) component C, and (iii) component D ?
The pressure responsible for the movement of water from root hair cells to the xylem is_________.
none of these
What is guttation?
Water and dissolved minerals get into the root hair of a plant by a process called A and enter the conducting tissue B. The process C helps the water and dissolved minerals to move up through the tissue B in roots and stem, and reach the leaves of a plant. In the leaves, food Is made by a process D. This food is then transported to all the parts of a plant through tissue E. The process of distributing food made in the leaves to all the parts of the plant is called F.
(a) What are (i) A (ii) B (iii) C (iv) D (v) E, and (vi) F?
(b) Which tissue is made up of living cells: B or E?
(c) Which tissue, B or E, contains sieve tubes?
(d) Which tissue, B or E, contains tracheids?
Why does water trickle off lotus leaves?
Reason (R): Xylem tissues are composed of dead cells which do not require energy to perform its function.
- A and R are correct and R is the correct explanation of A
- A is true but R is false.
- Both A and R are incorrect.
- A and R are correct but R is not the correct explanation of A.
How does phloem sap move in a plant?
- It occurs when absorption is low and transpiration is high
- It is the loss of water in the form of liquid droplets
- It occurs due to high root pressure
- It occurs through hydathodes
Which one of the following is a characteristic NOT related with the suitability of the roots for absorbing water?
(a) Tremendous surface area
(b) Contain cell sap at a higher concentration than the surrounding soil water
(c) Root hairs have thin cell walls
(d) Grow downward into the soil
What are the components of the transport system in highly organised plant
- Epidermal cell and guard cell
- Guard cell and stomatal pore
- Guard cell and epidermal cell
- Epidermal cell and stomatal pore
Which of the following statement/s is incorrect with regards to the above passage:
i. Food is translocated by xylem tracheids
ii. Translocation is multidirectional
iii. Food is synthesised primarily in leaves of the plant.
iv. Stem of the plant receive food by a process called translocation.
What is guttation and in which plants it can be seen?
Reason (R): Osmosis, root pressure and transpiration pull help in transportation of substances in plants.
- A is true but R is false.
- R is true but A is false.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
Xylem in plants is responsible for transport of: