Stomata: Opening and Closing

Q.

What are stomata ? What is the function of Stomata

Q.

Define stomata

Q.

What is the potassium pump theory? Explain in easy language.

Q.

The stomata open when the guard cells are:

1. Plasmolysed

2. Crenated

3. Turgid

4. Flaccid

Q. What is turgor movement? Explain it with example.

Q. What is root pressure?

Q.

Which instrument is used to measure root pressure?

Q.

In a hypertonic solution, the water molecules will move from outside the cell to inside.

1. True

2. False

Q.

The cell wall of root hair is thin and _____.

1. semi permeable

2. sometimes permeable

3. freely permeable

4. impermeable

Q.

why do stomata are mostly present in the lower part of epidermis ?

Q.

The stomata and root hair are ___ tissues.

1. dermal

2. vascular

3. ground

4. meristematic

Q. Formation of drops of water along leaf margin due to excessive root pressure is called ___ .

1. guttation
2. transpiration
3. imbibition
4. osmosis

Q. State where are stomata ideally located. Are they cellular structures?

Q. What is transpiration? How is it helpful for plants?

Q.

Explain difference between stomata and lower epidermal

Q. Stomata of a desert plant remins closed during the day. Explain how the carbon dioxide is taken in for the process of photosynthesis

Q.

The loss of turgor pressure in guard cells results in ___ of stomatal pore.

Q. Photosynthesis occurs in sites other than leaves also yet leaves are considered as the most suitable site for photosynthesis. Why?

Q. Leaves modified to spines to reduce transpiration is the adaptive feature of __________.

1. Marine plants

2. Hydrophytes

3. Mesophytes

4. Xerophytes

Q. What are the method used by plants to get rid of their waste products?

Q. Transpiration is considered as a necessary evil. Why ?

Q.

Which of the following cells are not related to the structure of stomata?

1. Guard cells

2. Accessory cells

3. Epidermal cells

4. Sclerenchymatous cells

Q. Identify the structure through which cuticular transpiration happens.

1. 
2. 
3. 

Q.

A single maize plant loses about ______ liter of water per day in the form of water vapour.

1. Three liter

2. Two liter

3. One liter

4. Half a liter

Q.

During day-time, the stomata are wide open primarily for the intake of ___________ for photosynthesis.

1. O₂

2. CO₂

3. N

4. none of these

Q. Distinguish between the following
(i) Filtration and diffusion
(ii) Turgor pressure and osmotic pressure
(iii) Hypotonic and hypertonic solutions
(iv) zosmosis and diffusion
(v) Flaccid condition and turgid condition
(vi) Plasmolysis and deplasmolysis

Q.

Name the structures that control the opening and closing of stomata.

Enter 2 words only.

Q. The loss of turgor pressure in _______ results in closure of stomatal pore.

1. chloroplast
2. guard cells
3. chlorophyll
4. root hair

Q.

The given figure represents the__ of the plant.

Q. How do the guard cells regulate opening and closing of stomatal pores?