1. Name the process being studied. 2. Explain the process named above in (a). 3. Why was the pot covered with a plastic sheet? 4. Suggest a suitable control for this experiment. 5. Mention two ways...
1. Name the process intended for study. 2. Define the above mentioned process. 3. When the weight of the test tubes A and B is taken before and after the experiment, what change is...
1. What is the purpose of keeping CaCl2 vials inside the cup? 2. After few hours CaCl2 vials were taken out and weighed again. Will you expect any difference in weight? If so, give reason....
1. Name the colour of dry cobalt chloride paper. 2. Is the experimental leaf a monocot or a dicot? Give a reason to support your answer. 3. Why are glass slides placed over the dry cobalt chloride...
1. Name the phenomenon being demonstrated. 2. What is the purpose of putting oil in the test tube? 3. What is the purpose of the spring balance in the set-up? 4. Would it make a...
(C) coated on both surfaces(D) left uncoated.All the four leaves A, B, C and D were left in a room for about 24 hours.1. Which leaf would become most limp? Why? 2. Which leaf would show least...
(a) Intensity of light: During the day, the stomata is open to facilitate the internal CO2 distribution of photosynthesis. At night it closes. Therefore, most transpiration occurs during the day....
The leaves of certain plants show water droplets on their sides in the morning. This is especially true for plants that grow in humid climates. The moist environment interferes with breathing while...
Forests have a large number of plants and trees. Plants therefore lose water in the form of daily water in the atmosphere through transpiration. A tree loses more than 30 gallons [30 L] of water a...
Factors pacing up the rate of transpiration: 1. Intensity of sunlight 2. Temperature 3. Velocity of wind 4. Humidity
Lenticels are a special opening from the old stem instead of stomata. This allows the diffusion of respiratory gases and photosynthesis. Lenticels do not close. They are always open....
A Potometer is an instrument that measures the amount of water consumed by a plant and this water intake is almost equal to the water lost through transpiration. The knife is sharpened and the twig...
Set-up A - Take a small, well-watered plant, preferably one with broad leaves. Place the pot completely in the polythene bag and wrap the mouth of the bag tightly around the stem. This will prevent...
Stomata contains minute openings in the epidermal layer of the leaves. The stomata are surrounded by two bean-shaped guard cells. Most transpiration occurs from the bottom of the dicot leaf. There...
The leaves of certain plants will wither during the day and regenerate in the evening. In some plants, e.g. balsam, the leaves of plants will wither during the day despite the abundance of water in...
GuttationBleedingThe leaves of certain plants show water droplets on their sides in the morning. This is especially true for plants that grow in humid climates. The water flows into special...
1. Transpiration is the loss of water as water ………… from the ………… parts of the plant. 2. Closing of ………… and shedding of leaves reduce …………. 3. Transpiration helps in creating …………. force and in...
1. Hydathodes and ……………………………… 2. Leaf spines and……………………………… 3. Lenticels and…………………………………. 4. Xylem and…………………………….. Answers: Hydathodes and guttation 2. Leaf spines and protection and reduced...
(i) Most transpiration occurs at midnight. (ii) Transpiration creates a pull for the upward movement of the sap. (iii) Wind velocity has an effect on transpiration. (iv) Voltmeter is an instrument...
1. A higher rate of transpiration is recorded on a windy day rather than on a calm day. 2. Excessive transpiration results in the wilting of the leaves. 3. Water transpired is the water absorbed. 4....
1. Potometer is an instrument used for demonstration of transpiration occurring from the lower surface of a leaf. 2. Hydathodes are similar to stomata in plant physiology. 3. Atmospheric humidity...
1. Openings on the stem through which transpiration occurs. 2. The process by which the intact plant loses water in the form of droplets. 3. An instrument used to find the rate of transpiration. 4....
(a) loss of water by the plant (b) evaporation of water from the aerial surfaces of a plant (c) loss of water, as water vapour, by a plant (d) release of water by a plant into the atmosphere Answer:...
(a) Stomata (b) Lenticels (c) Cuticle (d) Bark Answer: (b) Lenticels
(a)evaporation (b) perspiration (c) guttation (d) transpiration Answer: (d) transpiration
(a) cool, humid and windy (b) hot, humid and still (c) hot, humid and windy (d) hot, dry and windy Answer: (d) hot, dry and windy
(a) stomata (b) lenticels (c) lower epidermis of leaves (d) hydathodes Answer: (d) hydathodes
(a) big size of the leaf (b) Colour of the leaf (c) sunken stomata (d) sunny day Answer: (c) sunken stomata
(a) atmosphere is dry (b) temperature is high (c) humidity is high (d) atmosphere is dry and temperature is high Answer: (b) temperature is high
(a) increase (b) decrease rapidly (c) decrease slowly (d) remain the same Answer: (a) increase
(a) Open stomata, dry atmosphere and moist soil (b) Open stomata, high humid atmosphere and well irrigated soil (c) Open stomata, high humid atmosphere and dry soil (d) Closed stomata, dry...