Transport in Plants

Q.

What is cambium

Q. A certain tissue in a green plant somehow gets blocked and the leaves wilted. which was the tissue that got blocked?

Q. Choose the correct option(s) with respect to the transportation in plants.

1. Xylem transports water and minerals.
2. Flow in xylem is unidirectional.
3. Flow in phloem is unidirectional.
4. Flow in phloem is bidirectional.

Q. In the stem, the xylem tissue is situated towards the center.

1. True
2. False

Q. For getting plant juices, an aphid pierces its proboscis into which part of the plant?

1. Xylem
2. Phloem
3. Mesophyll cells
4. Lenticels

Q. Phloem is the tissue in plants that helps in organic translocation.

1. True
2. False

Q.

The diagram shows the stem of a plant. A strip of the outer tissue including the phloem has been removed. What would happen to a plant without functional phloem?

__

Q. (a) Leaves sometimes drip water at night. Suggest a cause.
(b) Guttation usually takes place at night when stomata are closed causing water evaporation to slow down. What environmental conditions cause guttation during the day? [2 MARKS]

Q. An aphid pierces its proboscis into the___to get plant juices.

Q.

____________is a plant tissue which conducts the minerals and water from roots to upper parts of the plant.

Q.

The transport of water takes place by phloem.

1. True
2. False

Q. How are honey dews produced by aphids?

Q. Complete the following statements by choosing the appropriate option for each blank:
Guttation takes place in ___________.

[1 Mark]

1. Mango tree
2. Grass
3. Banyan tree
4. Papaya plant

Q. Water enters the sieve tubes by the process called .

1. diffusion
2. root pressure
3. osmosis

Q. is the evaporative loss of water from the aerial parts of the plant.

1. Guttation
2. Transpiration
3. Nutrition
4. Excretion

Q. what are tannins?in the module it says xylem parenhyma stores tannins?

Q. Water enter into sieve tubes containing sugar by the process of ___.

1. translocation
2. absorption
3. osmosis
4. fixation

Q. In the leaves of strawberry shown in picture below, what causes the water droplets formation at the edge of leaf in the absence of dew in atmosphere?

1. Respiration
2. Osmosis
3. Root pressure
4. Diffusion

Q. Phloem is the tissue in plants that helps in organic translocation.

1. False
2. True

Q. Which tissue is involved in translocation of food in plants?

1. Xylem
2. Phloem
3. Tracheid
4. Vessels

Q. Process of ascent of sap in plants occurs
(a) by cortex
(b) by xylem
(c) by phloem
(d) by cambium

Q. Bleeding is observed in

1. Agave
2. Betula
3. Toddy palm
4. All of the above

Q. In plants, diffusion is the only process that aids in transportation of water and minerals.

1. True
2. False

Q. Assertion (A): Plants do not require active pumping system like heart for transportation.

Reason (R): Forces like osmosis, root pressure and transpiration pull help in transportation of substances in plants.

1. A is true but R is false.
2. R is true but A is false.
3. Both A and R are true and R is the correct explanation of A.
4. Both A and R are true but R is not the correct explanation of A.

Q. What is root pressure? How is it useful to the plants?

Q. Raj has a small garden. He was watering the plants and he over flooded a pot. He was wondering what happens to the root pressure in that plant. Choose the option that describes what would have likely happened.

1. The root pressure remains unchanged.
2. The root pressure increases.
3. The root pressure decreases.
4. The root pressure decreases and then increases.

Q. The diagram alongside represents the results of an experiment conducted on two freshly taken leafy shoots of a herbaceous plant. The lower ends of the shoots dip in ordinary water.
(i) What is the aim of the experiment?
(ii) Some parts of the stem in both the shoots have been removed. Name the conducting tissue in shoot (a) and in shoot (b) that has been removed.
(iii) What are the results of this experiment?
Figure