Transpiration

Appeared in 10 of the 11 available papers.

Examined in

10 of 11 papers

Appears almost every year — treat as core

Typically worth

6.5 marks

Average per paper it appears in · 65 marks in total

Usual form

Short answer

33% of this chapter's 60 questions

Needs a diagram

43%

26 questions carry a figure — practise drawing them

Question-type distribution

Short answer20
MCQ18
Reasoning8
Biological term5
Definition5
Sequencing1
Differentiate1
Diagram1

Most frequent topics

Transpiration 6Adaptations to reduce transpiration 4Cuticle 3Guard cells 3Guttation 3Lenticels 3Hydathodes 2Advantages of transpiration 2

Print:Questions only Questions + answers Answers only

Print chapter question bank

Showing 25 of 60 matching questions (64.5 marks).

25 questions

Given below is the diagram of an experimental setup to study the process of Transpiration. Cobalt chloride papers are fixed on the upper as well as lower surface of the leaf. Answer the questions that follow:

8(i)2021

MCQModerate1 mark

What is the aim of the experiment?

(a)To prove that more transpiration occurs from the lower surface of a dicot leaf.
(b)To prove that more transpiration occurs from the upper surface of a dicot leaf.
(c)To prove that transpiration is equal on both sides of the leaf.
(d)To prove that transpiration does not take place in a dicot leaf.

8(ii)2021

MCQEasy1 mark

What is the colour of dry cobalt chloride paper?

(a)Pink
(b)Blue
(c)Brown
(d)White

8(iii)2021

MCQHard1 mark

After about an hour, what change if any, would you expect to find in the cobalt chloride paper placed on the upper and lower surface of the leaf?

(a)Upper surface – Pink, Lower Surface – Blue.
(b)Upper surface – White, Lower surface – Blue.
(c)Upper surface – less pink, Lower surface – more pink.
(d)Upper surface – more pink, Lower surface – less pink.

8(iv)2021

MCQHard1 mark

Two adaptations in plants to reduce Transpiration are:

(a)Narrow leaves, Thin cuticle.
(b)Fewer stomata, Broad lamina of leaves.
(c)Thin cuticle, Sunken stomata.
(d)Narrow leaves, Fewer stomata.

8(v)2021

MCQModerate1 mark

The rate of transpiration is less when there is:

(a)High humidity in the air and low temperature.
(b)Less humidity in the air and decrease in atmospheric pressure.
(c)Bright sunlight and high temperature.
(d)More wind and low intensity of sunlight.

4(b)

Differentiate between the following pairs on the basis of what is mentioned in the brackets:

4(b)(i)2020

DifferentiateModerate1 mark

Transpiration and Guttation (place of occurrence)

5(a)

The diagram below represents an experiment to demonstrate a certain phenomenon in a green plant (a leafy shoot fixed by rubber tubing to a glass tube standing in mercury):

5(a)(i)2020

Short answerHard1 mark

Will the level of mercury in the glass tubing rise or fall? Which conducting tissue of the plant does the glass-tubing represent?

5(a)(ii)2020

DefinitionModerate1 mark

Define Transpiration.

5(a)(iii)2020

ReasoningModerate1 mark

How would the rate of the above process differ if the environment of the plant has: 1. Less humidity 2. High temperature?

5(a)(iv)2020

Short answerModerate1 mark

State any two advantages of transpiration to the plant.

1(e)

Choose the correct answer from the four options given below:

1(e)(v)2019

MCQModerate1 mark

Which one of the following does not affect the rate of transpiration?

(a)Light
(b)Humidity
(c)Wind
(d)Age of the plant

5(a)

Given below is an apparatus which was set up to investigate a physiological process in plants. The setup (a potted plant under a bell jar, the pot sealed in a rubber sheet, standing on a glass plate with vaseline) was placed in bright sunlight. Answer the questions that follow:

5(a)(i)2019

DefinitionModerate1 mark

Name the process being studied. Define the process.

5(a)(ii)2019

ReasoningHard1 mark

Why was the pot enclosed in a rubber sheet?

5(a)(iii)2019

Short answerModerate1 mark

Mention two external factors which can accelerate the above process.

5(a)(iv)2019

Short answerModerate1 mark

List two adaptations in plants to reduce the above process.

5(a)(v)2019

DiagramHard1 mark

Draw a neat, labelled diagram of a stomatal apparatus.

1(a)

Name the following:

1(a)(v)2018

Biological termEasy1 mark

The wax-like layer on the epidermis of leaves which reduces transpiration.

1(e)

Correct the following statements by changing the underlined words:

1(e)(iv)2018

Correct the statementModerate1 mark

XYLEM transports starch from the leaves to all parts of the plant body.

1(f)

Choose between the two options to answer the question specified in the brackets for the following: Example: Corolla or Calyx (Which is the outer whorl?) Answer: Calyx

1(f)(iii)2018

Short answerModerate1 mark

Lenticels or stomata (Which one remains open always?)

2(b)

Mention the exact location of the following:

2(b)(iv)2018

Short answerModerate1 mark

Hydathodes

7(a)

The diagram below represents a process in plants (a leafy shoot in a flask of water with a layer of oil on top, the whole standing on a weighing machine). The setup was placed in bright sunlight. Answer the following questions: