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Question

Identify the structures marked as A , B and C in the image given below:

  1. A- scutellum, B- epicotyl, C- radicle
  2. A- scutellum, B- coleoptile, C- coleorrhiza
  3. A- epicotyl, B- coleorrhiza, C- coleoptile
  4. A- epicotyl, B- scutellum, C- root cap


Solution

The correct option is B A- scutellum, B- coleoptile, C- coleorrhiza
The image given here is the L.S of grass (monocot) embryo.

‘A’ is scutellum which is the cotyledon situated towards the lateral side of the embryonal axis.

‘B’ is coleoptile that encloses a few leaf primordia and shoot apex of the epicotyl (portion of the embryonal axis above the level of attachment of scutellum).

‘C’ is coleorrhiza which is a sheath enclosing the root cap.

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