Module: | Pre-fertilization: Micro/Megasporogenesis
Q23: Consider the following statements regarding the anatomy of a monocotyledonous embryo:
1. In the grass family, the single large, shield-shaped cotyledon is specifically called the scutellum.
2. The shoot apex and a few leaf primordia are enclosed in a solid, undifferentiated sheath called the coleorhiza.
3. The radicle and root cap are protected and enclosed by a hollow foliar structure called the coleoptile.
Which of the above statements is/are correct?
2. The shoot apex and a few leaf primordia are enclosed in a solid, undifferentiated sheath called the coleorhiza.
3. The radicle and root cap are protected and enclosed by a hollow foliar structure called the coleoptile.
Which of the above statements is/are correct?
✅ Correct Answer: A
The correct option is A. Only Statement 1 is correct.
Monocotyledonous embryos, particularly in the grass family (Poaceae, which includes wheat and maize), possess only one cotyledon.
Structurally, this cotyledon is large, shield-shaped, and laterally situated parallel to the embryonal axis; it is scientifically termed the scutellum.
Statements 2 and 3 contain inversely mapped definitions.
The lower end of the embryonal axis contains the radicle and root cap, which are enclosed in an undifferentiated protective sheath called the coleorhiza.
The upper portion of the axis (epicotyl) contains the shoot apex and leaf primordia, which are protected by a hollow, foliar structure known as the coleoptile.
The causal reason for these unique sheaths is to protect the delicate root and shoot meristems as they forcefully push through the soil during germination.
Monocotyledonous embryos, particularly in the grass family (Poaceae, which includes wheat and maize), possess only one cotyledon.
Structurally, this cotyledon is large, shield-shaped, and laterally situated parallel to the embryonal axis; it is scientifically termed the scutellum.
Statements 2 and 3 contain inversely mapped definitions.
The lower end of the embryonal axis contains the radicle and root cap, which are enclosed in an undifferentiated protective sheath called the coleorhiza.
The upper portion of the axis (epicotyl) contains the shoot apex and leaf primordia, which are protected by a hollow, foliar structure known as the coleoptile.
The causal reason for these unique sheaths is to protect the delicate root and shoot meristems as they forcefully push through the soil during germination.