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Biology Question 119 – NEET-UG 2023

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Family Fabaceae differs from Solanaceae and Liliaceae. With respect to the stamens, pick out the characteristics specific to family Fabaceae but not found in Solanaceae or Liliaceae.

Recall the characteristic stamen arrangements and anther types for the families Fabaceae, Solanaceae, and Liliaceae.

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Ninja Strategy•Characteristic Recall

Directly recall the unique stamen characteristics of Fabaceae (diadelphous) and eliminate options that describe features of other families or incorrect types.

Step 1: Recall Stamen Characteristics of the Families✦ Active

To identify the characteristic specific to Fabaceae but not found in Solanaceae or Liliaceae, we need to recall the typical stamen features of each family:

- Fabaceae (Leguminosae): Characterized by diadelphous stamens (filaments united into two bundles, typically 9 fused and 1 free) and dithecous anthers.

- Solanaceae: Characterized by epipetalous stamens (stamens attached to petals) and dithecous anthers.

- Liliaceae: Characterized by epiphyllous stamens (stamens attached to the perianth, specifically tepals) and dithecous anthers.

Step 2: Identify Unique Features for Fabaceae○ Expand

The question asks for characteristics specific to Fabaceae that are absent in both Solanaceae and Liliaceae. From the recall in Step 1:

- Diadelphous stamens are a distinctive feature of Fabaceae and are not found in Solanaceae (which has epipetalous) or Liliaceae (which has epiphyllous).

- Dithecous anthers are common to all three families, so this feature alone is not specific to Fabaceae in this comparison.

💡 Teacher's Secret Hint

Focus on the combination of features in each option, as one part might be common while the other is distinguishing.

Step 3: Evaluate the Options○ Expand

Let's evaluate each option based on the identified characteristics:

- (1) Diadelphous and Dithecous anthers: Diadelphous stamens are specific to Fabaceae among the given families. This option fits the criteria.

- (2) Polyadelphous and epipetalous stamens: Polyadelphous stamens are not characteristic of Fabaceae, and epipetalous stamens are characteristic of Solanaceae.

- (3) Monoadelphous and Monothecous anthers: Monoadelphous stamens and monothecous anthers are not characteristic of Fabaceae (e.g., found in Malvaceae).

- (4) Epiphyllous and Dithecous anthers: Epiphyllous stamens are characteristic of Liliaceae, not Fabaceae.

Therefore, the characteristic specific to family Fabaceae but not found in Solanaceae or Liliaceae is diadelphous stamens, making option (1) the correct answer.

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