Calyx Structure and Aestivation — NEET Biology
📚 Practice ConceptCalyx: sepals five, united, persistent, valvate aestivation
Which of the above statements are correct about the floral characteristics of Solanaceae? S1: The flowers of Solanaceae are typically bisexual and actinomorphic. S2: The calyx consists of five united sepals with valvate aestivation, and remains persistent. S3: The corolla has five united petals, exhibiting valvate aestivation, and stamens are epipetalous. S4: The androecium contains five stamens, which are free and arranged in two bundles. S5: The gynoecium is bicarpellary, syncarpous, with a superior ovary and parietal placentation.
View solution & NCERT explanation
Correct answer: A — S1, S2 and S3 only
Let's evaluate each statement regarding the floral characteristics of Solanaceae as per NCERT: S1: As stated in NCERT, Solanaceae flowers are bisexual and actinomorphic. This statement is CORRECT. S2: The calyx of Solanaceae has five united sepals, shows valvate aestivation, and is persistent. This statement is CORRECT. S3: The corolla consists of five united petals with valvate aestivation. The stamens are epipetalous, meaning they are attached to the petals. This statement is CORRECT. S4: The androecium of Solanaceae has five stamens which are epipetalous. The description 'free and arranged in two bundles' refers to diadelphous condition (e.g., pea) and is not characteristic of Solanaceae. The stamens in Solanaceae are epipetalous and typically free from each other, but not arranged in two bundles. This statement is NOT correct. S5: The gynoecium is bicarpellary, syncarpous, with a superior ovary. However, the placentation in Solanaceae is axile, not parietal. This statement is NOT correct. Therefore, statements S1, S2, and S3 are correct.
What does NCERT say about Calyx sepals five united?
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