Absorption of Water

Q.

How is the mycorrhizal association helpful in absorption of water and minerals in plants?

Q.

Choose the correct option: Mycorrhiza is a symbiotic association of fungus with root system which helps in

(A) Absorption of water (B) Mineral nutrition

(C) Translocation (D) Gaseous exchange

Options:

1. Only A

2. Both B and C

3. Only B

4. Both A and B

Q. The upward movement of water in a plant towards the stem and leaves is called ascent of sap.

1. False
2. True

Q.

How do mycorrhizae help the plants to grow better?

Q. Symplast and apoplast pathway helps us to understand

1. both b and c
2. ascent of sap
3. movement of sugars through phloem
4. absorption of water by roots into xylem

Q. Symplast and apoplast pathway helps us to understand

1. ascent of sap
2. movement of sugars through phloem
3. absorption of water by roots into xylem
4. both b and c

Q. A shoot from a balsam plant is kept in eosin solution $\left(\text{pink in colour}\right)$ for $3-4$ hours. The pink colour is most likely to be observed in

1. epidermal cells
2. phloem tissue
3. cortex
4. xylem tissue

Q. During absorption of water by roots, the water potential of cell sap is lower than that of:

1. Soil solution but higher than that of pure water
2. Pure water but higher than that of soil solution
3. Neither pure water nor soil solution
4. Pure water and soil solution

Q. Many transplanted seedlings may not survive because

1. they do not like the new soil
2. the leaves get damaged
3. most of the root hair are lost during transplantation
4. they do not get the required mineral salts

Q. VAM are

1. Saprophytic bacteria
2. Saprophytic fungi
3. Symbiotic fungi
4. Symbiotic bacteria

Q.

What does Apoplastic growth mean? Apoplastic growth is through formation of. a)Cell wall and cell junction

b)Matrix and fibres of connective tissue c)intake of water

Q.

Name the following: ​
iv) The structure through which thin, delicate root hairs extend.​

Q. Mycorrhiza is a symbiotic association of roots of higher plants with

1. Actinomycetes fungi mainly
2. Basidiomycetes fungi mainly
3. Bacteria
4. Cyanobacteria

Q. Water will be absorbed by root hairs when

1. Concentration of salts in the soil is high.
2. Concentration of solutes in the cell sap is high.
3. The plant is rapidly respiring.
4. They are separated from the soil by a semipermeable membrane.

Q. Root hairs help in reducing the surface area for absorption.

1. False
2. True

Q.

The correct sequence of radial movement of water in root is:

1. Soil water $\to$ Root hair $\to$ Cortex $\to$ Endodermis $\to$ Pericycle $\to$ Xylem

2. Epidermis $\to$ Cortex $\to$ Pericycle $\to$ Endodermis $\to$ Xylem

3. Soil water $\to$ Root hair $\to$ Epidermis $\to$ Pericycle $\to$ Endodermis $\to$ Xylem

4. Root hair $\to$ Cortex $\to$ Pericycle $\to$ Phloem $\to$ Xylem

Q. In experiment No.5 we are using mercury in the test-tube and the beaker. Why can't we use water instead?

Q. what is pericycle in the roots of plants?

Q.

How is the mycorrhizal association helpful in absorption of water and minerals in plants?

Q. Mycorrhiza is a symbiotic association between

1. Algae and fungi
2. Bacteria and fungi
3. Fungi and roots of higher plants
4. Blue green algae and roots of higher plants.

Q. Guard cells help in __________.

1. Protection against grazing animals
2. Guttation
3. Respiration
4. Transpiration

Q. Assertion :Symbiosis is furnished by mycorrhiza Reason: In mycorrhiza, symbiosis is established
between fungus and alga

1. If both the assertion and the reason are true and the reason
   is a correct explanation of the assertion
2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
3. If the assertion is true but the reason is false
4. If both the assertion and reason are false

Q. During absorption of water by roots, the water potential of cell sap is lower than that of

1. pure water and soil solution
2. neither pure water nor soil solution
3. pure water but higher than that of soil solution
4. soil solution but higher than that of pure water

Q. Name the type of interaction seen in each of the following examples.
Mycorrhizae living on the roots of higher plants.

Q. When concentration of solutes is low in the soil, absorption of water is

1. Retarded
2. Normal
3. Stopped
4. Increased

Q. The mycorrhizal relationship between a fungi and the roots of Pinus is

1. Saprophytic
2. Symbiotic
3. Epiphytic
4. Parasitic

Q. Root hairs help in reducing the surface area for absorption.

1. False
2. True

Q. In which of the following options would transpirational pull cause water to move from root parenchyma to root xylem? (Values are in kPa)

1. $\begin{array}{ccccc}& \text{Root Parenchyma}& & \text{Root Xylem}& \\ & {\psi }_P& {\psi }_S& {\psi }_P& {\psi }_S\\ \left(a\right)& 200& -190& -200& 5\end{array}$
2. $\begin{array}{ccccc}& \text{Root Parenchyma}& & \text{Root Xylem}& \\ & {\psi }_P& {\psi }_S& {\psi }_P& {\psi }_S\\ \left(b\right)& -200& 220& 65& -5\end{array}$
3. $\begin{array}{ccccc}& \text{Root Parenchyma}& & \text{Root Xylem}& \\ & {\psi }_P& {\psi }_S& {\psi }_P& {\psi }_S\\ \left(c\right)& 200& -220& 65& -5\end{array}$
4. $\begin{array}{ccccc}& \text{Root Parenchyma}& & \text{Root Xylem}& \\ & {\psi }_P& {\psi }_S& {\psi }_P& {\psi }_S\\ \left(d\right)& 200& -220& -65& -5\end{array}$

Q. Water potential of a cell is lowered by the

1. Addition of solutes
2. Addition of water
3. Increase in temperature
4. Decrease in temperature

Q. Water potential can be obtained by

1. OP + TP
2. OP $=$ WP
3. P + $\pi$
4. OP - DPD