Question

Paracytic type of stomata are distinctive feature of:

• A. Ranunculaceae
• B. Brassicaceae
• C. Rubiaceae
• D. Caryophyllaceae

Hint:

The alternative names for stomatal types are often derived from the family they characterize. Remembering these associations can be a great shortcut: \textbf{Para}cytic = \textbf{Ru}biaceous \textbf{Anomo}cytic = \textbf{Ranu}nculaceous \textbf{Aniso}cytic = \textbf{Cruci}ferous \textbf{Dia}cytic = \textbf{Caryo}phyllaceous

Answer 1

The Correct Option is C

Step 1: Concept Overview:
The question requires identification of the plant family characterized by paracytic stomata. Stomatal types are categorized by the number and arrangement of subsidiary cells around the guard cells.
Step 2: Detailed Explanation:
Stomatal types and their associated families are defined below:

Paracytic (Rubiaceous) type: Stomata are flanked by two subsidiary cells with long axes parallel to the guard cells. This is a key characteristic of the Rubiaceae family.
Anomocytic (Ranunculaceous) type: Stomata are surrounded by cells indistinguishable from other epidermal cells. This characterizes the Ranunculaceae family.
Anisocytic (Cruciferous) type: Stomata are surrounded by three subsidiary cells, one significantly smaller than the other two. This characterizes the Brassicaceae (Cruciferae) family.
Diacytic (Caryophyllaceous) type: Stomata are enclosed by two subsidiary cells with a common wall perpendicular to the long axis of the guard cells. This characterizes the Caryophyllaceae family.
Step 3: Conclusion:
Therefore, paracytic stomata are characteristic of the Rubiaceae family.