Transpiration

Q.

Transpiration is important for plants because:

I: It removes extra water

II: It cools down the plant

III: It helps in exchange of gasses

IV: It helps in the transport of water upwards

Choose the correct set of statements.

1. I, II and IV

2. II and III

3. II, III and IV

4. I, II and III

Q.

The loss of water in the form of water vapour from the aerial parts of a living plant is termed as ___.

Q.

The instrument used for measuring the rate of transpiration is called a potometer. State true or false.

1. Photometer

2. Potometer

Q. Why do plants need to do transpiration?

Q.

The loss of water in the form of water vapour through the stomata of leaves is known as___.

1. Cuticular transpiration

2. Stomatal transpiration

3. Areolar transpiration

4. None of the above

Q.

why does standing under a tree on a hot summer day create a cooling effect?

Q. Which of the following statement best describes transpiration?

1. The flow of water from the soil into the root hair cell.
2. The flow of water from the root upto the xylem vessel.
3. The ascent of sap and its evaporation through aerial parts.
4. The evaporation of water

Q. Transpiration is regulated by the movements of __________.

1. none of the above
2. guard cells
3. epithelial cells
4. parenchyma cells

Q.

Reva carried out an experiment, she took a watered potted plant and placed it on a sheet of glass and covered it with a bell jar. The edge of the bell jar is sealed with vaseline to make it airtight.The whole apparatus is then placed in a sunny place for an hour or two.After a couple of hours, she observed that the inner walls of the bell jar get accumulated with drops of moisture.What does this signify?

1. The plants get rid of the excess water in the form of water vapour through the leaves.

2. Both a and b

3. This shows the process of transpiration in plants.

4. None of the above

Q.

What are the importance of transpiration in plants?

Q.

During winter, the rate of transpiration is lower due to ___________

1. Leaves wilt during winter

2. Leaves are lost during winter

3. Stomata of leaves are lost during winter

4. There's no water in soil during winter

Q. Transpiration is important for plants :

1. to enable the process of photosynthesis.
2. to enable the transport of water and mineral from soil to leaves.
3. it enables the plant to maintain concentration of the sap.
4. It enables the plant to warm itself and its surroundings.

Q.

Transpiration is the loss of _______ from the aerial parts of the plant.

1. carbon dioxide

2. none of these

3. minerals

4. water

Q.

__ is the process of evaporation of water from the leaves.

Q. Transpiration is more when the wind is blowing faster as water evaporates faster from leaves.

1. True
2. False

Q.

How does transpiration affect the climate?

Q.

One word answer

The pores present on the surface of leaves.

Q.

Transpiration will be the fastest when the day is

1. hot, dry and windy

2. cool, humid and windy

3. hot, humid and still

4. hot, humid and windy

Q.

Transpiration in plants occurs through tiny pores on leaves. These pores are known as

1. lenticels

2. epidermis

3. cuticles

4. stomata

Q.

__ (Transpiration/ Respiration) can be investigated by placing a plastic bag over the shoot of a plant.

Q.

Transpiration rate is highest during ___________

1. None of the choices

2. Cloudy afternoon

3. Rainy season

4. Sunny Afternoon

Q.

Which of these is the best description of transpiration?

1. The movement of air or dissolved gases into and out of the stomata.

2. The process by which green plants and certain other organisms transform light energy into chemical energy.

3. The process of oxidizing food molecules, like glucose, to carbon dioxide and water.

4. The evaporative loss of water from the aerial parts of the plant.

Q. The movement of water from the soil to the foliage in tall trees is primarily due to .

1. guttation
2. root pressure
3. transpiration
4. diffusion

Q.

Trees use a straw-like mechanism to pull water up to the tips. This pull is created by a phenomenon known as ______ .

1. Nutrition

2. Digestion

3. Perspiration

4. Transpiration

Q.

Leaves lose more water from

1. Veins

2. Upper surface

3. Lower surface

4. Lower surface and Upper surface

Q.

Wilting occurs when_______

1. Excessive root pressure

2. Absorption higher than transpiration

3. High relative humidity of atmosphere

4. Transpiration higher than absorption

Q. Which one is against the theory of ascent of sap by Dixon and Joly?

1. Pores in tracheary elements
2. Cohesion force of water molecules
3. Adhesion force of water molecules
4. Requirement of ATP

Q. At high temperature, the rate of transpiration _______.

1. increases
2. remains same
3. decreases
4. stops

Q.

__ is the process of evaporation of water from the leaves.

Q.

Transpiration is defined as

1. The loss of water s water vapour from the roots as well as the leaves of the plant.

2. The loss of water as water vapour from the aerial parts of a plant.

3. The elimination of water with dissolved water products

4. The rise of water up to the stem of a plant