Class 12 · Sexual Reproduction in Flowering Plants

Monocot Embryo Structure: Cotyledon — NEET Biology

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Embryos of monocotyledons possess only one cotyledon. In the grass family the cotyledon is called scutellum that is situated towards one side (laterally) of the embryonal axis. At its lower end, the embryonal axis has the

🖼️Related NCERT figure: Two diagrams showing embryo structures. (a) shows a typical dicot embryo with labeled parts: Plumule, Cotyledons, Hypocotyl, Radicle, and Root cap. (b) shows a longitudinal section of an embryo of grass with labeled parts: Scutellum, Coleoptile, Shoot apex, Epiblast, Radicle, Root cap, and Coleorrhiza. (Figure 1.14 (a) A typical dicot embryo; (b) L.S. of an embryo of grass)
NCERT Biology · Class 12 · Chapter 1 · Paragraph 65
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Which of the following statements about a monocot embryo are NOT correct? S1: Monocotyledonous embryos are characterized by a single cotyledon, termed scutellum in the grass family. S2: The embryonal axis in monocots bears the radicle and root cap, both enclosed by a hollow foliar structure called coleoptile. S3: The epicotyl, which is the portion of the embryonal axis above the scutellum, includes the shoot apex and a few leaf primordia. S4: The scutellum is situated terminally along the embryonal axis in monocot embryos. S5: The coleorrhiza is an undifferentiated sheath that covers the root tip and radicle in monocot embryos.

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