Transportation in Plants

Q.

The major driving force for transport of water through xylem in plants, during the day, is __(i)__ and during the night, is __(ii)__.

1. (i) diffusion, (ii) osmosis

2. (i) root pressure, (ii) transpiration

3. (i) transpiration, (ii) root pressure

4. (i) active transport, (ii) transpiration

Q.

What are subsidiary cells?

Q. The mutual attraction between water molecules is called while is the attraction of water molecules to the surface.

1. osmosis
2. cohesion
3. capillarity
4. adhesion
5. transpiration

Q.

How does the water enter the plant and reaches its top?

Q.

Majority of the minerals are absorbed by active absorption because:

1. Minerals are present in the form of ions in the soil.

2. The concentration of minerals is more in the root than soil.

3. Charged particles cannot move across cell membrane.

4. Root cells have excess energy.

Q. provides mechanical support to the xylem.

1. Cellulose
2. Lignin
3. Glucose

Q. Describe the transportation system in plants. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> [Textbook Question 7d pg no.178]

Q.

Sieve tubes and companion cells are components of xylem tissue.

1. True
2. False

Q.

Transpiration facilitates ___ and ___ in plants.

1. organic translocation and temperature regulation.

2. ascent of sap and photosynthesis.

3. ascent of sap and temperature regulation.

4. organic translocation and respiration.

Q.

Assertion: Plants do not require an active pumping system like heart for transportation.

Reason: Plants have large proportion of dead cells and energy requirement is high.

1. Assertion is true and reason is false.

2. Assertion and reason both are true.

3. Assertion if false and reason is true.

4. Assertion and Reason both are false.

Q. What happens to a freshwater fish in seawater? Explain with osmosis.

Q.

In the image below label A and B

1. A - Companion cells, B - Sieve tube

2. A - Phloem fibres, B - Companion cells

3. A - Sieve tube, B - Companion cells

4. A - Companion cells, B - phloem fibres

Q.

Predict the direction of net movement of water molecules in the picture below.

1. No movement of water molecules

2. B to A

3. A to B and B to A

4. A to B

Q.

Which of these are vascular tissues in the plants?

1. Phloem

2. Xylem

3. Meristematic tissue

4. Epithelial tissue

Q.

Transpiration in tall trees occur through:

1. Stomata

2. Bark of the tree

3. Lenticles

4. Cuticle

Q. The movement of food in phloem is bidirectional.

1. True
2. False

Q. Water is transported from the roots to all parts of the plant by while distributes the products of photosynthesis from leaves to all parts.

1. root hair
2. xylem
3. phloem
4. stem
5. petiole

Q.

Which of the following contributes most to transport of water from ground to leaves of a tall tree?

1. breakdown of ATP

2. capillary rise of water in xylem

3. cohesion of water and transpiration pull

4. root pressure

Q. What is the benefit of sweating in the human body?

1. Cooling
2. Damped skin
3. Moisturisation
4. Protection

Q.

Why is lignin present in xylem?

Q.

When you pour a few drops of water on the leaf of a plant, such as banana leaf or peepal, it does not enter the leaf by osmosis. Give reasons.

Q.

What is fish osmoregulation?

Q.

What are companion cell and phloem fibers?

Q.

What does the white colored substance in bird droppings consists of?

1. Urea

2. None of the above

3. Ammonia

4. Uric Acid

Q.

How does simple diffusion work?

Q. is the nearest source of raw materials like nitrogen, phosphorus and other minerals for plants.

1. Water
2. Soil
3. Air
4. Leaves
5. Lightning

Q.

Diffusion is when water moves from its higher concentration to lower concentration through a semi permeable membrane.

1. True
2. False

Q. Why is xylem tissue called as wood?

Q. In the given setup, which of the following arrows show the correct movement of water molecules.

1. 
2. 
3. 

Q. _____ prepare food and ____ transports food to all parts of the plant.

1. Leaves and xylem
2. Roots and xylem
3. Leaves and phloem
4. Roots and phloem