Factors Affecting Transpiration

Q.

Transpiration occurs mainly through the________.

1. root

2. stem

3. leaf

4. stomata

Q. The outermost layer of the eyeball is white in colour, tough and is called __.

Q.

Which parts of a plant is/are responsible for the process of transpiration?

1. Stomata

2. Cuticle

3. Root hair

4. Both A and B

Q.

Which of the following are the factors that affect transpiration?

1. Wind

2. Intensity of light

3. Mineral concentration gradient

4. Humidity

Q.

Which one of the following favours the fastest transpiration rate?

1. A cool, humid, windy day

2. A hot, humid, still day

3. A hot, humid, windy day

4. A hot, dry, windy day

Q.

In big trees, there are no stomata in trunks like those in stems of small plants, so gases pass through small openings in bark known as

1. cuticles

2. lenticels

3. hard stomata

4. hard pores

Q.

Write the differences between evaporation and transpiration.

Q.

On rainy days, the rate of transpiration is

1. High

2. Low

3. Depends on the intensity of rainfall

4. None of these

Q.

Transpiration will be more in dim light.

1. True
2. False

Q. How does a lotus flower grows? Mention its process.

Q.

The lower surface of leaf will have more number of stomata in a

1. Isobilateral leaf

2. None of above

3. Both A and B

4. Dorsiventral leaf

Q.

Transpiration ____ with wind speed.

Q.

Assertion: Less water content in soil decreases transpiration in plants.

Reason: Dehydration leads to closure of stomata on the surface of leaves.

1. Assertion is true and Reason is false.

2. Both Assertion and Reason are true but Reason is not the correct explanation for Assertion.

3. Both Assertion and Reason are true and Reason is the correct explanation for Assertion.

4. Both Assertion and Reason are false.

Q.

During transpiration water evaporates through ______________ called of plants.

1. Palisade

2. Mesophyll

3. Epithelial

4. None of these

Q.

As light intensity increases, rate of transpiration

1. remains same

2. decreases and then increases

3. increases

4. decreases

Q.

Write any two differences between evaporation and transpiration.

Q.

The rate of transpiration reduces if ___

1. Wind is blowing.

2. Groundwater is sufficiently available.

3. Relative humidity is high.

4. Environment is hot and dry.

Q.

The spines seen on desert plants are modified leaves.

1. True

2. False

Q.

Which of the following are the factors that affect transpiration?

1. Soil

2. Intensity of light

3. Mineral concentration gradient

4. Humidity

Q.

Which of the following plants will not have transpiration?

1. Plants growing in hilly regions

2. Aquatic, submerged plants

3. Aquatic plants with floating leaves

4. Plants growing in deserts

Q.

Due to low atmospheric pressure, the rate of transpiration will

1. increase

2. remain unaffected

3. decrease slowly

4. decrease rapidly

Q.

Match the reasons given in column 2 to the features of cacti on column 1.

$\begin{array}{cc}Featureofcacti& Reasons\\ a.\text{Spiny leaves}& \left(i\right)\text{Absorbing water from depths of soil}\\ b.\text{Thick, round fleshy stems}& \left(ii\right)\text{Prevent loss of water by transpiration}\\ c.\text{Deep roots}& \left(iii\right)\text{Store water}\\ d.\text{Closed stomata during the day}& \left(iv\right)\text{Prevent animals from eating the cactus}\\ e.\text{Carbon dioxide storage during the night}& \end{array}$

Choose the correct option that matches correctly. There can be multiple matches.

1. a – (iv); b – (ii); c - (iv), (iii); d – (i); e – (iii), (ii)

2. a – (ii), (iv); b – (ii), (iv); c - (i); d – (iii); e – (iii), (ii)

3. a – (ii), (iv); b – (ii); c - (i); d – (iii); e – (iii), (ii)

4. a – (ii), (iv); b – (iii); c - (i); d – (ii); e – (ii)

Q. Tissue found at lower surface of leaf