Transpiration

Assertion: Waxy and cutin coating on plant parts reduce the transpiration.

Reason    : These adaptation are found in xerophytes.

Assertion: Light is a very important factor in transpiration.

Reason: Light induces stomatal opening and darkness closing of stomata. Therefore, transpiration increases in light and decreases in dark.

Read the following statements and choose the correct option 

Statement A: Stomata are absent in submerged hydrophytes.

Statement B : Respiration occurs by means of air chambers in submerged plants.

Stomatal movements are influenced by a number of environmental factors. Which of the following statements is/are incorrect regarding this?

(i) Blue light keeps stomata open during the day promoting the movement of $K^{+}$ ions into guard cells.
(ii) Increased ${\mathrm{CO}}_2$ concentration reduces the pH of guard cells which promotes conversion of sugar into starch, ultimately causing closure of stomata.
(iii) Abscisic acid, under stress conditions, causes rapid movement of $K^{+}$ ions into guard cells.
(iv) Highly concentrated sucrose or salt solution when applied over to stomata, results in stomatal opening.

Which of the following element directly impacts in the opening and closing of stomata?

Match the column-I with column-II and select the correct combination.

Which of the following have sunken stomata?

Maximum transpiration occurs by_____type of transpiration.

Different species of plants growing in the same area show the same rate of transpiration at a particular time.

Which is/are NOT the characteristics of the guard cell?

Water release in the guttation is the pure form of water.

Guattation is due to

During the day, transpiration and photosynthesis are interlinked.

Cells that are present around the guard cell known as_____ cells.

_____ stomata check excessive transpiration.

Promotion of uptake and translocation of solute is one of the features of transpiration in plants.

Cuticle is present in which type of plants?

Cuticular transpiration accounts for more than 50% of total transpiration.

_____ considered as the major organ for transpiration.

The amount of water absorbed by plants is much less than its own requirement.