Introduction to Transport in Plants

Q.

The diagram alongside represents a layer of epidermal; cells showing a fully grown root hair.Study the diagram and answer the questions that follow:

(a) Name the parts labelled A, B, C and D.

(b) The root hair cell is in a turgid state. Name and explain the process that caused this state.

(c) Mention one distinct difference between the parts labelled A and B.

(d) Draw a diagram of the above root hair cell as it would appear when a concentrated solution of fertilizers is added near it.

Q.

How are water and minerals transported in plants?

Q.

Name the tissue in plants that is involved in the transportation of water and mineral salts.

__

Q. The phloem tissue in plants is responsible for the transport of:

1. Water
2. Minerals
3. Food
4. All of the above

Q.

The outer layer of root hair is made up of pectin and the inner layer is made up of ___

Q.

The diagram shows a shoot growing from a potato tuber. What is being transported in the phloem cells at X?

1. Starch downwards

2. Starch upwards

3. Sugars downwards

4. Sugars upwards

Q.

Which of the following are the functions of water inside the plant?

1. Turgidity

2. Transport

3. Cooling

4. Food production

Q. what is turgor movement? explain with example

Q.

The plasma membrane of root hair is ___ in nature.

1. Semi-permeable

2. Permeable

3. Transparent

4. Impermeable

Q. Water is essential for all living organisms. Which of these options make the above statement true?

1. Water is a universal solvent.
2. Water is required for photosynthesis.
3. Protoplasm of the cell is nothing but water
4. Water is the medium through which solutes are transported.

Q.

How is the movement of water and sucrose different in plants

Q. The outer layer of root hair is made up of pectin and the inner layer is made up of ______ .

1. starch
2. chitin
3. cellulose
4. chlorophyll

Q.

Water vapour evaporates from leaves. This process is called transpiration. This may be investigated by placing a plastic bag over the shoot of a plant as shown. Drops of a liquid appear on the inside of the bag. Cobalt chloride paper will be changed into ___________ colour if the drops of liquid are drops of water.

1. The liquid changes the colour of cobalt chloride paper to blue

2. The liquid changes the colour of cobalt chloride paper to pink

3. The liquid changes the colour of cobalt chloride paper to white

4. The liquid changes the colour of cobalt chloride paper to black

Q.

Root hairs are single-celled structures.

1. True
2. False

Q.

Root hair are outgrowth of ________.

Q.

Just below the root cap lies the region of

1. Elongation

2. Root hairs

3. Sieve tubes

4. Meristem

Q. Which of the following vascular tissue helps in transportation of water and minerals in plants?

1. Xylem
2. Meristematic tissue
3. Parenchyma
4. Phloem

Q.

Can the stems of plants be compared with a street with two-way traffic? Give reason.

Q.

Name two elements of xylem through which water and dissolved materials reach the leaves

Q. Question 12
What are the differences between the transport of materials in xylem and phloem?

Q. How many molecules of O2 i.e. oxygen molecule are present in 1L air containing 80% volume of O2 at STP?

Q. What is the nature of plasma membrane of root hair?

Q.

The chemical composition of the root hair having a separate layer of pectin outer to the cellulosic wall is ___________

1. Calcium lignite

2. Calcium silicate

3. Calcium pectate

4. Calcium nitrate

Q. which of the following are present in vascular tissue system?

1. Collenchyma and Sclerenchyma
2. xylem and phloem
3. chlorenchyma and sclerenchyma
4. Epidermis and Periderm

Q. Water will be absorbed by root hair when

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

Q. The vascular tissue that transports food in different parts of plants is

1. Phloem
2. Leaves
3. Xylem
4. Blood

Q.

Which of the following statement(s) is/are true?

1. Root cap has no role in absorption because it has no root hair

2. In plants, water supply occurs due to guttation

3. Water available to the plants is by capillary action

4. Wilting of the plant occurs when phloem is blocked

Q. Assertion :Upward movement of water is called as ascent of sap. Reason: Upward movement of water occurs through xylem and phloem.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
3. Assertion is correct but Reason is incorrect.
4. Both Assertion and Reason are incorrect.

Q. Differentiate between guttation and bleeding in plants.

Q. Mark the correct purpose of water absorption in plants

1. For mechanical function
2. All of the above
   
3. For transportation of water and minerals
4. For photosynthesis