Identify the structures associated with a typical dicot embryo.(A) Ra…

The correct answer is Option (3) → (A), (B) and (D) only

Note: The given answer is as per the official NTA Answer Key. However, the question prints “dicot” where “monocot (grass)” is meant, as explained below. For a typical dicot embryo only (A) Radicle is right, and no option gives that. Option (3) fits the embryo of a grass, which is a monocot.

An embryo has an embryonal axis. In a dicot, it has two cotyledons, a plumule above and a radicle below. The embryo of a grass (a monocot) has one cotyledon, called the scutellum, and some extra parts.

(A) Radicle — Present. It is the root tip at the lower end of the embryonal axis, covered by the root cap. Both the dicot and the grass embryo have it.

(B) Coleoptile — Present in the grass embryo. It is the hollow sheath that encloses the shoot apex. The dicot embryo does not have it.

(C) Tapetum — Not a part of any embryo. It is the innermost layer of the anther wall, and it nourishes the developing pollen grains.

(D) Epiblast — Present in the grass embryo. It is labelled in the grass embryo and is not found in the dicot embryo.

NCERT Extract:
Embryo – “Embryos of monocotyledons (Figure 1.14 b) 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.”