1. What is the main opening present in a hydathode?
A.
Water pore
B.
Root hair
C.
Lenticel
D.
Stomatal chamber
Correct Answer:
Water pore
Explanation:
A hydathode has a specialized opening called a water pore through which water is released.
2. The loose parenchymatous tissue found below the water pore of a hydathode is called:
A.
Epithem
B.
Cork
C.
Palisade tissue
D.
Endodermis
Correct Answer:
Epithem
Explanation:
The epithem is a loose parenchymatous tissue located below the water pore in a hydathode.
3. Which vascular tissue usually reaches the epithem of a hydathode?
A.
Xylem
B.
Phloem
C.
Cork cambium
D.
Collenchyma
Correct Answer:
Xylem
Explanation:
Xylem endings extend into the epithem of a hydathode and supply it with water.
4. Hydathodes are commonly located at the:
A.
Margins or tips of leaves
B.
Centers of roots
C.
Middle of the stem
D.
Surface of seeds
Correct Answer:
Margins or tips of leaves
Explanation:
Hydathodes are usually specialized structures found at leaf margins or leaf tips.
5. A hydathode is best described as a structure specialized for:
A.
Releasing water from leaves
B.
Absorbing minerals from soil
C.
Producing pollen
D.
Storing starch in roots
Correct Answer:
Releasing water from leaves
Explanation:
Hydathodes are leaf structures that release water through specialized water pores.
6. Which part of a hydathode lies directly below its water pore?
A.
Epithem
B.
Root cap
C.
Pith
D.
Cambium
Correct Answer:
Epithem
Explanation:
The epithem is positioned beneath the water pore and is made of loosely arranged cells.
7. In a hydathode, the terminal ends of xylem vessels are connected with the:
A.
Epithem
B.
Cuticle
C.
Root hair zone
D.
Palisade layer
Correct Answer:
Epithem
Explanation:
The xylem endings in a hydathode terminate near or within the epithem.
8. The water pore of a hydathode generally remains:
A.
Permanently open
B.
Sealed by cork
C.
Covered by root hairs
D.
Filled with chloroplasts
Correct Answer:
Permanently open
Explanation:
Unlike ordinary stomata, the water pore of a hydathode generally remains open.
9. Which combination correctly represents important structural parts of a hydathode?
A.
Water pore, epithem, and xylem endings
B.
Root cap, phloem, and root hairs
C.
Pollen sac, anther, and filament
D.
Cork, lenticel, and vascular cambium
Correct Answer:
Water pore, epithem, and xylem endings
Explanation:
A typical hydathode consists of a water pore, an epithem, and xylem endings supplying the region.
10. The cells of the epithem in a hydathode are generally:
A.
Loosely arranged parenchymatous cells
B.
Closely packed cork cells
C.
Thick-walled sclerenchymatous cells
D.
Pollen-forming cells
Correct Answer:
Loosely arranged parenchymatous cells
Explanation:
The epithem consists mainly of loosely arranged parenchymatous cells located beneath the water pore.
Short questions are currently unavailable for this page.