Module: | Pre-fertilization: Micro/Megasporogenesis
Q22: Consider the following statements regarding the anatomy of a dicotyledonous embryo:
1. A typical dicotyledonous embryo consists of a central embryonal axis and two laterally attached cotyledons.
2. The portion of the embryonal axis situated above the level of cotyledons is the hypocotyl, which terminates in the radicle.
3. The portion of the embryonal axis below the level of cotyledons is the epicotyl, which terminates in the plumule.
Which of the above statements is/are correct?
2. The portion of the embryonal axis situated above the level of cotyledons is the hypocotyl, which terminates in the radicle.
3. The portion of the embryonal axis below the level of cotyledons is the epicotyl, which terminates in the plumule.
Which of the above statements is/are correct?
✅ Correct Answer: A
The correct option is A. Only Statement 1 is correct.
Statements 2 and 3 present an inverted terminology trap.
Structurally, a mature dicot embryo has a main embryonal axis with two fleshy cotyledons attached to it that store food.
The region of the embryonal axis strictly above the point of attachment of the cotyledons is termed the epicotyl ("epi" meaning above). The epicotyl terminates in the plumule, or the stem tip.
Conversely, the cylindrical portion below the level of the cotyledons is the hypocotyl ("hypo" meaning below), which terminates at its lower end in the radicle, or root tip.
The radicle is further protected by a root cap.
Historically, swapping the definitions of epicotyl and hypocotyl is the most prevalent distractor utilized in botanical anatomy testing to evaluate spatial comprehension.
Statements 2 and 3 present an inverted terminology trap.
Structurally, a mature dicot embryo has a main embryonal axis with two fleshy cotyledons attached to it that store food.
The region of the embryonal axis strictly above the point of attachment of the cotyledons is termed the epicotyl ("epi" meaning above). The epicotyl terminates in the plumule, or the stem tip.
Conversely, the cylindrical portion below the level of the cotyledons is the hypocotyl ("hypo" meaning below), which terminates at its lower end in the radicle, or root tip.
The radicle is further protected by a root cap.
Historically, swapping the definitions of epicotyl and hypocotyl is the most prevalent distractor utilized in botanical anatomy testing to evaluate spatial comprehension.