1. What does the radicle of an embryo develop into?
A.
Primary root
B.
Primary shoot
C.
First leaf
D.
Seed coat
Correct Answer:
Primary root
Explanation:
The radicle is the embryonic part that develops into the primary root of the plant.
2. Which part of the embryonic axis gives rise to the radicle?
A.
Upper end
B.
Lower end
C.
Middle region
D.
Cotyledon surface
Correct Answer:
Lower end
Explanation:
The radicle is located at the lower end of the embryonic axis and forms the primary root.
3. The radicle usually emerges from the seed before the plumule during germination. What does it form first?
A.
Primary root
B.
Flower
C.
First fruit
D.
Seed coat
Correct Answer:
Primary root
Explanation:
The radicle emerges early during germination and develops into the primary root.
4. Which structure protects the radicle in a typical dicot embryo after it develops into a root?
A.
Root cap
B.
Leaf sheath
C.
Seed coat
D.
Cotyledon
Correct Answer:
Root cap
Explanation:
The growing root tip formed from the radicle is protected by the root cap.
5. In a monocot embryo, the radicle is protected by which sheath-like structure?
A.
Coleoptile
B.
Coleorhiza
C.
Testa
D.
Scutellum
Correct Answer:
Coleorhiza
Explanation:
In monocots, the radicle is enclosed and protected by a sheath called the coleorhiza.
6. Which of the following is the embryonic root?
A.
Radicle
B.
Plumule
C.
Hypocotyl
D.
Epicotyl
Correct Answer:
Radicle
Explanation:
The radicle is specifically known as the embryonic root because it develops into the primary root.
7. During seed germination, the emergence of the radicle generally marks the beginning of development of the:
A.
Root system
B.
Flower system
C.
Fruit wall
D.
Seed coat
Correct Answer:
Root system
Explanation:
Since the radicle forms the primary root, its emergence begins the development of the root system.
8. In a monocot seed, which structure is directly associated with protecting the radicle?
A.
Coleorhiza
B.
Coleoptile
C.
Scutellum
D.
Endosperm
Correct Answer:
Coleorhiza
Explanation:
The coleorhiza is the protective sheath surrounding the radicle in a monocot embryo.
9. Which statement about the radicle is correct?
A.
It develops into the primary root
B.
It develops into the seed coat
C.
It forms the cotyledon
D.
It becomes the flower bud
Correct Answer:
It develops into the primary root
Explanation:
The main function and developmental fate of the radicle is to form the primary root.
10. The radicle is found at which end of the embryonic axis?
A.
Root end
B.
Shoot end
C.
Leaf end
D.
Cotyledonary end
Correct Answer:
Root end
Explanation:
The radicle occupies the root end of the embryonic axis and gives rise to the primary root.
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