Potometer.

Q. Which among the following statements are correct with respect to root pressure?

1. Root pressure is generated in the roots and helps drive water in both directions.
2. Root pressure helps in continuous movement of water through xylem.
3. Root pressure is responsible for the ascent of sap in plants.
4. Root pressure can push water up to small heights in a plant.

Q.

What is a potometer ?

Q.

A potometer directly measures the rate of____________.

1. transpiration in leaves

2. water loss in shoot

3. water uptake in shoot

4. none of these

Q.

Darwin's potometer helps to demonstrate the suction force created due to ___ .

1. translocation

2. root pressure

3. both translocation and root pressure

4. transpiration

Q.

Potometers measure the water lost during transpiration.

1. False

2. True

Q. Measure the rate of transpiration with the help of Ganong's potometer.

Q. Potometers measure the rate of of water by a plant.

1. lost
2. taken up
3. stored

Q.

The potometer works on the principle of

1. Osmotic pressure

2. Root pressure

3. Amount of water absorbed equals the amount transpired

4. The potential difference between the tip of the tube and that of the plant

Q.

Name the device that is used to measure the rate of transpiration.

Enter 2 words or less.

Q. Three plants (a), (b) and (c) were placed in beakers containing coloured water. The water in each beaker was covered with a layer of oil. The leaves were removed from plant (b), while plant (c) was exposed to strong light.
(i) In which plant, (a), (b) or (c) would the water move up the fastest?
(ii) In which plant (a), (b) or (c), would the water move up slowly?
(iii) Why was the water covered with a layer of oil?
(iv) What is being investigated by this experiment?
Figure

Q. Which of the following is not a correct limitation while using potometer?

1. Potometer does not measures the accurate rate of transpiration
2. Water retained by the plant is neglected
3. Introducing the air bubble is not easy
4. None of the above

Q. Which of the following is used to determine the rate of transpiration in plants?

1. Porometer
2. Potometer
3. Tensiometer
4. Auxanometer

Q. Potometer works on the principle of

1. Amount of water absorbed equals the amount traspired
2. Root pressure
3. Osmotic pressure
4. Potential difference between the tip of the tube and that of the plant

Q.

Potometer works on the principle of

1. Amount of water absorbed equals to the amount transpired

2. Root pressure

3. Osmotic pressure

4. Potential difference between the tip of the tube and that of the plant

Q.

An instrument used to find the rate of transpiration

1. potometer

2. anemometer

3. barometer

4. richter scale

Q.

The instrument used for measuring the rate of transpiration is

1. Photometer

2. Potometer

3. Porometer

4. Lactometer