1. What is the epicotyl in a plant embryo?
A.
The part of the embryonic axis above the cotyledons
B.
The part of the embryonic axis below the cotyledons
C.
The outer covering of the seed
D.
The root cap of the embryo
Correct Answer:
The part of the embryonic axis above the cotyledons
Explanation:
The epicotyl is the portion of the embryonic axis located above the cotyledons.
2. Which embryonic structure develops from the epicotyl?
A.
The plumule
B.
The radicle
C.
The seed coat
D.
The endosperm
Correct Answer:
The plumule
Explanation:
The epicotyl gives rise to the plumule, which develops into the shoot of the young plant.
3. Where is the plumule located in relation to the epicotyl?
A.
At the upper end of the epicotyl
B.
At the lower end of the radicle
C.
Inside the seed coat only
D.
Below the root cap
Correct Answer:
At the upper end of the epicotyl
Explanation:
The plumule is present at the upper end of the epicotyl and forms the young shoot.
4. The epicotyl is mainly associated with the development of which plant part?
A.
Shoot
B.
Root
C.
Seed coat
D.
Fruit wall
Correct Answer:
Shoot
Explanation:
The epicotyl develops into the shoot system, including the young stem and leaves.
5. In a dicot embryo, the epicotyl lies in which position?
A.
Above the cotyledons
B.
Below the cotyledons
C.
Inside the radicle
D.
Outside the embryo
Correct Answer:
Above the cotyledons
Explanation:
In a dicot embryo, the epicotyl is the embryonic axis region located above the two cotyledons.
6. Which part of the embryonic axis bears the plumule?
A.
Epicotyl
B.
Radicle
C.
Root cap
D.
Cotyledonary blade
Correct Answer:
Epicotyl
Explanation:
The plumule is associated with the epicotyl, the upper portion of the embryonic axis.
7. During seedling development, the epicotyl helps form the young:
A.
Shoot
B.
Root hair
C.
Seed coat
D.
Endosperm
Correct Answer:
Shoot
Explanation:
The epicotyl develops into the young shoot and supports the formation of aerial plant parts.
8. In a monocot embryo, the epicotyl is associated with which structure?
A.
Plumule
B.
Radicle
C.
Coleorhiza only
D.
Endosperm only
Correct Answer:
Plumule
Explanation:
In monocots, the epicotyl bears the plumule, which is protected by the coleoptile.
9. What is the main function of the epicotyl during embryo development?
A.
To form the embryonic shoot
B.
To absorb water from the soil
C.
To protect the seed from drying
D.
To store food in the seed coat
Correct Answer:
To form the embryonic shoot
Explanation:
The epicotyl forms the embryonic shoot through its association with the plumule.
10. Which statement about the epicotyl is correct?
A.
It is the upper part of the embryonic axis and bears the plumule
B.
It is the lower part of the embryonic axis and bears the radicle
C.
It forms the seed coat around the embryo
D.
It is the food-storage tissue of the seed
Correct Answer:
It is the upper part of the embryonic axis and bears the plumule
Explanation:
The epicotyl is the upper region of the embryonic axis, and it bears the plumule that develops into the shoot.
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