NEET BIOLOGY

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STRUCTURAL ORGANISTION OF PLANTS AND ANIMALS

ANATOMY OF FLOWERING PLANTS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Identify the correct statementa) Stomata are present on both epidermal layers in isobilateral leavesb) Guard cells are dumb-bell shaped in grass leavesc) Photosynthesis do not occur in guard cellsd) Stomata opens when guard cells are flaccid
A
a, c
B
c, d
C
a, b
D
b, d
Explanation: 

Detailed explanation-1: -So, the correct option is ‘Guard cells invariably possess chloroplasts and mitochondria.

Detailed explanation-2: -Therefore, this is the correct answer. Option C: Grasses are monocot. Hence, it has dumb-bell shaped guard cells. Therefore, this is an incorrect answer.

Detailed explanation-3: -Grasses (Poaceae) form morphologically innovative stomata, which consist of two dumbbell-shaped guard cells flanked by two lateral subsidiary cells (SCs). This ‘graminoid’ morphology is associated with faster stomatal movements leading to more water-efficient gas exchange in changing environments.

Detailed explanation-4: -Stomata are tiny openings or pores in plant tissue that allow for gas exchange. Stomata are typically found in plant leaves but can also be found in some stems. Specialized cells known as guard cells surround stomata and function to open and close stomatal pores.

There is 1 question to complete.
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