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  4. Observe this diagram of L.S. of embryo of grass. Which of these labels represent the functional cotyledon and Rudimentary cotyledon? <img class=img-fluid question-image alt=Question src=https://cdn.tardigrade.in/q/nta/b-olvz0veihokp.png />

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Q. Observe this diagram of L.S. of embryo of grass. Which of these labels represent the functional cotyledon and Rudimentary cotyledon?
Question

NTA AbhyasNTA Abhyas 2020Sexual Reproduction in Flowering Plants

Solution:

The correct labels of this diagram are
Solution
In this scutellum is the functional cotyledon while epiblast which is a flap lie structure represents the rudimentary cotyledon. Embryos of monocotyledons possess only one cotyledon. In the grass family the cotyledon is called scutellum that is situated towards one side (lateral) of the embryonal axis. At its lower end, the embryonal axis has the radical and root cap enclosed in an undifferentiated sheath called coleorrhiza. The portion of the embryonal axis above the level of attachment of scutellum is the epicotyl. Epicotyl has a shoot apex and a few leaf primordia enclosed in a hollow foliar structure, the coleoptile.