Lakhmir Singh solutions for बायोलॉजी [अंग्रेजी] कक्षा १० आईसीएसई chapter 5 - Transpiration [Latest edition]

Cobalt chloride paper changes from blue to ______ on absorbing moisture.

Ganong's potometer measures the water ______ by the plant.

In transpiration, the water is lost in the form of ______.

True or False.

Rate of transpiration is high in desert plants.

True or False.

Loss of weight in a plant before and after a set of conditions indicate loss of water through transpiration.

True or False.

The rate of transpiration is the same in all the plants.

At what time the weight of plant is measured in the weighing method of measuring transpiration?

Ganong's potometer may not give accurate results due to:

Why do leaves of some plants wilt during midday inspite of there being plenty of water in the soil?

Do you know how plants affect the climate of an area?

Does age of a plant affect the rate of transpiration?

Does transpiration mean excretion for the plants?

Lenticels are the openings in the bark of woody ______.

Transpiration is regulated by the movements of ______.

______ is more in the lower surface of the leaf.

True or False.

90% of total transpiration is done by stomata.

True or False.

Thickness of cuticle affects the rate of transpiration.

True or False.

Transpiration is highest during winters.

Rate of transpiration is not affected by ______.

Transpiration pull is due to ______.

______ are pores through which xylem sap is excreted.

Rate of transpiration decreases with an increase in ______.

Thick ______ cuts down the rate of transpiration.

True or False.

Humidity promotes transpiration in plants.

True or False.

Sunken stomata are present in xerophytes.

True or False.

Guttation occurs during midday.

Most of transpiration in tall trees occurs through ______.

The rate of transpiration increases with an increase in ______.

True or False.

Rate of respiration affects rate of transpiration.

True or False.

Transpiration will be fastest when the day is hot, dry and windy.

True or False.

The change in colour of litmus paper is an indicator of demonstration of transpiration.

True or False.

In a leaf, the cell sap in each cell exerts a wall pressure outward on the cell wall.

True or False.

The opening and closing of stomata is regulated by the guard cells.

Exudation of sap from injured or cut part of a plant is ______.

Sunken stomata are a feature of plants growing in ______.

In cactus, the leaves are modified into ______ to reduce transpiration.

More transpiration occurs from the ______ surface of the leaf.

Special pores at the tip of veins through which guttation occurs is ______.

Match the Following.

Give One Word Answer.

A scientist name used for measuring rate of transpiration.

Give One Word Answer.

Part of leaf that allows transpiration.

Give One Word Answer.

Cell sap in rubber tree.

Give One Word Answer.

The outer waxy covering of epidermis.

Give One Word Answer.

Device to measure the rate of transpiration.

Which of the following is not a function of stomata?

Which among the following is an external factor affecting transpiration?

One of the internal factors that affect rate of transpiration is:

Transpiration will be maximum during ______ day.

From which part of the leaf does most water evaporates from?

Why is transpiration considered as a necessary evil?

Write the different types of transpiration in plants.

What is the significance of sunken stomata? Where are they found?

Write three factors that affect transpiration.

Give two examples of Guttation.

Give two examples of Sunken stomata.

How does the rate of transpiration differ during windy day?

How does the rate of transpiration differ during hot day?

How does the rate of transpiration differ during humid day?

What is a potometer?

Mention the drawbacks of potometer.

Why are potassium ions necessary for plants?

Define the following term:

Transpiration

Define the following:

Guard cells

Define the following term:

Cuticle

Define the following term:

Hydathodes

Differentiate between transpiration and guttation.

Distinguish between the following:
Transpiration and evaporation

Mention the differences between stomatal and lenticular transpiration.

Differentiate between guttation and bleeding in plants.

Give reason for the following:

If you uproot a plant from the soil, its leaves soon wilt.

Explain the mechanism of closing and opening of the stomata. 

Explain the experiment of Ganong's potometer.

Describe the methods to measure transpiration in plants.

Explain the mechanism that brings about closure of stomata.

Write the external factors that influences transpiration.

Write the internal factors that influences transpiration.

Write the experiment to measure transpiration in plants using cobalt chloride paper.

The diagram below represents an experiment to demonstrate a certain phenomenon in a green plant:

1. Will the level of mercury in the glass tubing rise or fall?
2. Which conducting tissue of the plant does the glass-tubing represent?
3. Define transpiration.
4. How will the rate of the above process differ if the environment of the plant has
   1. Less humidity
   2. High temperature?

Given below is an apparatus which was setup to investigate a physiological process in plants. The setup was placed in bright sunlight. Answer the questions that follow:

1. Name the process being studied. Define the process.
2. Why was the pot enclosed in a rubber sheet?
3. Mention two external factors which can accelerate the above process.
4. List two adaptations in plants to reduce the above process.
5. Draw a neat, labelled diagram of a stomatal apparatus.

The diagram of an given below demonstrates a particular process in plants. Study the same and answer the questions that follow:

1. Name the apparatus.
2. Which phenomenon is demonstrated by this apparatus?
3. Explain the phenomenon mentioned in (ii) above.
4. State two limitations of using this apparatus.
5. What is the importance of the air bubble in the experiment?
6. Name the structures in a plant through which the above process takes place.

Find out how to calculate the number of stomata in a leaf.

[Hint: Field view (V) = Radius (r) = Diameter/2]

Area of field view = πr²

Density of stomata = `"Number of stomata"/"Area of field view"`]

The field view (V) = 0.13 mm²

The density of stomata (D) = ______ per mm

Total number of stomata over 1 mm² = V × D = ______

A Spanish oak tree has ______ stomata per mm².

Learn to calculate the surface area of leaf.

Take a leaf. Draw the leaf on a graph paper. Remove the leaf from the graph paper. Count the squares and half squares (as you have learnt in Mathematics).

Total surface area of the leaf (in cm²) = ______

After you find out the leaf surface area of your leaf, now calculate the water loss according to conditions mentioned in the table below:

Write the full form of the measurement: MPa. What is it used for?

Write the requirement of this in atmosphere, leaf, xylem, roots and soil.