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CAM Pathway

Stomatal open...

Question

Stomatal opening is influenced by

N_{2}

concentration,

C O_{2}

concentration and light.

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Water content of epidermal cells, temperature and light.

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N_{2}

concentration, light and temperature.

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C O_{2}

concentration,

N_{2}

concentration and temperature.

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Solution

The correct option is C Water content of epidermal cells, temperature and light.
Water is absorbed by the guard cells which causes them to swell up and open the stomatal pore.
In many plants that are present in dry regions, the stomatal closes with high temperature so as to prevent water loss.
In the presence of sunlight, stomatal pores are open for photosynthesis but q night when sunlight is absent, the stomata gets closed to prevent loss of water through transpiration.
Nitrogen gas concentration does not have any significant amount of effect on stomata.
Hence the correct answer is 'Water content of epidermal cells, temperature and light'.

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Similar questions

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Q. When

N_{2} O_{5}

is heated at certain temperature, it dissociates as

N_{2} O_{5} (g) ⇌ N_{2} O_{3} (g) + O_{2} (g); K_{c} = 2.5

. At the same time

N_{2} O_{3}

also decomposes as:

N_{2} O_{3} (g) ⇌ N_{2} O + O_{2} (g)

. If initially

4.0

moles of

N_{2} O_{5}

are taken in

1.0

litre flask and allowed to dissociation, concentration of

O_{2}

at equilibrium is

2.5 M

Equilibrium concentration of

N_{2} O_{5}

is:

Q. An equilibrium mixture of

N_{2}, H_{2}

and

N H_{3}

700

K contains

0.036

N_{2}

and

0.15

H_{2}

. At this temperature,

K_{c}

for the reaction

N_{2} (g) + 3 H_{2} (g) ⇌ 2 N H_{3} (g)

0.29

. What is the concentration of

N H_{3}

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