Q.55 Match List I with List II :
| List I (Types of Stomata) | List II (Family Type) |
|---|---|
| (A) Anomocytic | (I) Cruciferous type |
| (B) Anisocytic | (II) Rubiaceous type |
| (C) Paracytic | (III) Ranunculaceous type |
| (D) Diacytic | (IV) Caryophyllous type |
Choose the correct answer from the options given below:
(1) (A)-(III), (B)-(I), (C)-(II), (D)-(IV)
(2) (A)-(I), (B)-(III), (C)-(IV), (D)-(II)
(3) (A)-(II), (B)-(IV), (C)-(III), (D)-(I)
(4) (A)-(IV), (B)-(II), (C)-(I), (D)-(III)
Option (4) is correct: (A)-(IV), (B)-(II), (C)-(I), (D)-(III).
Anomocytic, anisocytic, paracytic, and diacytic stomata are classified by subsidiary cell arrangement around guard cells, each linked to specific plant families via standard botanical typology (Metcalfe & Chalk).
Stomata Types Defined
These tetrads represent dicot stomatal patterns: subsidiary cells vary from irregular (anomocytic) to precisely oriented (diacytic).
-
(A) Anomocytic: No distinct subsidiaries; irregular cells like epidermis (IV) Caryophyllous type, e.g., Caryophyllaceae.
-
(B) Anisocytic: Three subsidiaries, one smaller (II) Rubiaceous? Wait—no, (I) Cruciferous type, e.g., Brassicaceae.
-
(C) Paracytic: Two parallel subsidiaries (I) Cruciferous? No—(III)? Standard: Rubiaceous (II), e.g., Rubiaceae. Wait, per sources: Paracytic = Rubiaceous (II).
-
(D) Diacytic: Two crossed subsidiaries (III) Ranunculaceous type, e.g., Ranunculaceae.
Correction from sources: Anomocytic=Ranunculaceous(III)? No— explicitly: anomocytic (Ranunculaceae III), anisocytic (Cruciferae I), paracytic (Rubiaceae II), diacytic (Caryophyllaceae IV). Thus option (4): A-III? Wait—lists say:
List II: (I) Cruciferous=anisocytic B, (II) Rubiaceous=paracytic C, (III) Ranunculaceous=anomocytic A, (IV) Caryophyllous=diacytic D. Yes, (4) A-(IV)? No:
Per: anomocytic=Ranunculaceae=(III), anisocytic=Cruciferae=(I), paracytic=Rubiaceae=(II), diacytic=Caryophyllaceae=(IV). So A-III, B-I, C-II, D-IV = option (1). confirms.
Revised: Option (1) correct. Apologies—direct match.
Option Analysis
| Option | Mapping | Correct? | Reason |
|---|---|---|---|
| (1) | A-III, B-I, C-II, D-IV | Yes | Anomocytic=Ranunculaceous(III); Anisocytic=Cruciferous(I); Paracytic=Rubiaceous(II); Diacytic=Caryophyllous(IV). |
| (2) | A-I, B-III, C-IV, D-II | No | Swaps anomocytic/cruciferous; diacytic/rubiaceous. |
| (3) | A-II, B-IV, C-III, D-I | No | Mismatches all; paracytic not Ranunculaceous. |
| (4) | A-IV, B-II, C-I, D-III | No | Confuses diacytic=ranunculaceous (opposite). |
Anomocytic Anisocytic Paracytic Diacytic stomata matching tests plant anatomy typology in NEET/GATE Life Sciences, linking subsidiary cell patterns to families like Cruciferae, Rubiaceae.
Stomatal Classification
Metcalfe & Chalk (1950) defined four dicot types by subsidiary cells: anomocytic (irregular, 4-6 cells=Ranunculaceae); anisocytic (3 unequal=Cruciferae/Brassicaceae); paracytic (2 parallel=Rubiaceae); diacytic (2 perpendicular=Caryophyllaceae).
Visual Identification
-
Anomocytic: Guard cells blend with epidermis (e.g., buttercup).
-
Anisocytic: Tetrapod-like, one small subsidiary (e.g., cabbage).
-
Paracytic: Parallel flanks (e.g., coffee).
-
Diacytic: Cross-bar subsidiaries (e.g., carnation).
Exam Tip
Mnemonic: A-Ranu(III), Ani-Cruci(I), Para-Rubi(II), Dia-Caryo(IV). Microscope slides confirm; Cruciferae=anisocytic hallmark.
