Transpiration rate is high, when $……$
- AAtmospheric water is saturated with vapour.
- BLight is very dim.
- CTemperature is low
- ✓Atmosphere is dry and temperature is high.
Answer: D.
View full solution →Question types
Transpiration question types
73 questions across 7 question groups — pick any mix to generate a Biology paper with step-by-step answer keys.
73
Questions
7
Question groups
5
Question types
01
MCQ
19 Q→02Fill in the blanks.
1 Q→03[1 Mark Question Answer]
22 Q→04[2 Mark Question Answer]
16 Q→05[3 marks Question Answer]
10 Q→06[5 Mark Question Answer]
3 Q→07TRUE / FALSE
2 Q→Sample Questions
Transpiration questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
Who had said that "transpiration is a necessary evil"?
- ✓Curtis
- BSteward
- CAnderson
- D$\text{J.C.}$ Bose
Answer: A.
View full solution →Stomata can open in night also in _______________
- ✓xerophyte
- Bgametophyte
- Chydrophyte
- Dnone of these
Answer: A.
View full solution →Transpiration rate is low ____________
- Adue to less surface area of leaf
- Bbenting of leaf
- CBy sunken stomata
- ✓all of the above
Answer: D.
View full solution →Transpiration generates __________
- ✓Suction force
- Bcapillary force
- CImbibitions force
- Datmospheric pressure
Answer: A.
View full solution →Hydathodes: ______
Name the paper which is used to show loss of water through stomata of a leaf.
Name the instrument used for measuring the rate of transpiration.
Write the correct substitutes for only the first two words if it is a wrong statement.
Name the opening on the stem through which transpiration occurs.
Explain how the rate of transpiration is affected on:
a foggy day
a foggy day
Mention three adaptations found in plants to reduce transpiration.
A well watered healthy potted plant with variegated leaves was kept in darkness for about 24 hours. It was then set up as shown in the diagram and exposed to light for about 12 hours. At the end of this time, leaf x and y were tested for starch. Study the diagram and answer the questions that follow:
(i) Why was the plant initially kept in darkness for 24 hours?
(ii) What is the function of sodium hydroxide solution in the flask?
(iii) Select the correct leaf from the five available choices shown in the diagram as a, b, c, d and e. Rewrite the correct answer by filling in the appropriate letter for the questions that follow:
1. After the starch test, leaf x would look like ______.
2. After the starch test, leaf y would look like ______.
(iv) The experiment with leaf y shows that photosynthesis requires the presence of certain factors. Mention any one factor.
(i) Why was the plant initially kept in darkness for 24 hours?
(ii) What is the function of sodium hydroxide solution in the flask?
(iii) Select the correct leaf from the five available choices shown in the diagram as a, b, c, d and e. Rewrite the correct answer by filling in the appropriate letter for the questions that follow:
1. After the starch test, leaf x would look like ______.
2. After the starch test, leaf y would look like ______.
(iv) The experiment with leaf y shows that photosynthesis requires the presence of certain factors. Mention any one factor.
What is the impact of transpiration on absorption? Explain.
Explain how the rate of transpiration is affected on:
a windy day
a windy day
Explain the importance of transpiration.
The apparatus shown here is Ganong's photometer designed to demonstrate unequal transpiration from the two surfaces of a dorsiventral leaf. Before keeping the leaf in between the cups, anhydrous calcium chloride ($CaCl_2$) contained in two small vials were weighted and placed in both the cups. The ends of the cups were weighted and with corks through which two mercury manometers were connected. After a few hours, $CaCl_2$vials were taken out and weighed again.
(i) What is the purpose of keeping $CaCl_2$vials inside the cup?
(ii) After a few hours, $CaCl_2$vials were taken out and weighed again.
will you except any difference in weight? If so, give reasons.
(iii) What was expect the purpose of using a manometer?
(iv) What do you mean by transpiration?
View full solution →(i) What is the purpose of keeping $CaCl_2$vials inside the cup?
(ii) After a few hours, $CaCl_2$vials were taken out and weighed again.
will you except any difference in weight? If so, give reasons.
(iii) What was expect the purpose of using a manometer?
(iv) What do you mean by transpiration?
The figure below represents the set-up at the start of certain experiment to demonstrate an activity of plants:
(i) What is the aim of the experiment?
(ii) Why has oil been put in each test tube?
(iii) What will be the observations in the two test-tubes after about 2-3 days?
(iv) Give reasons to explain any change observed as answered in (iii) above.
(v) Why has the test-tube b without the plant, been taken in the experiment?
(i) What is the aim of the experiment?
(ii) Why has oil been put in each test tube?
(iii) What will be the observations in the two test-tubes after about 2-3 days?
(iv) Give reasons to explain any change observed as answered in (iii) above.
(v) Why has the test-tube b without the plant, been taken in the experiment?
Why do plants absorb more water than what is required by them? Give three uses of this phenomenon.
Write short note on the following:
Guttation
Guttation
Write short note on the following:
Hydathodes
Hydathodes
The diagram alongside represents a structure found in a leaf. Study the same and answer the questions that follow:
(i) Name the parts labeled A and B.
(ii) What is the biological term for the above structure?
(iii) What is the function of the part labeled A?
(iv) Mention two structural features of A, which help in the function mentioned in (iii) above?
(v) Where is this structure likely to be found in a leaf?
(vi) The structure (fig.5.22) helps in the process of transpiration. Explain the term transpiration.
(vii) How many other cells are found surrounding this structure as seen in the diagram?
(i) Name the parts labeled A and B.
(ii) What is the biological term for the above structure?
(iii) What is the function of the part labeled A?
(iv) Mention two structural features of A, which help in the function mentioned in (iii) above?
(v) Where is this structure likely to be found in a leaf?
(vi) The structure (fig.5.22) helps in the process of transpiration. Explain the term transpiration.
(vii) How many other cells are found surrounding this structure as seen in the diagram?
Describe an experiment to prove that transpiration occurs more from the lower surface of a leaf.
Differentiate between guttation and bleeding in plants.
Low humidity in the atmosphere results in decrease in the rate of transpiration.
Litmus paper is used to demonstrate transpiration from the leaves of the green plant.
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