1. What is guttation?
A.
Loss of water as liquid droplets from leaf margins
B.
Loss of water vapour through stomata
C.
Absorption of minerals by roots
D.
Production of food in leaves
Correct Answer:
Loss of water as liquid droplets from leaf margins
Explanation:
Guttation is the loss of water in the form of liquid droplets, usually from the margins or tips of leaves.
2. In guttation, water is released from a plant in which form?
A.
Water vapour
B.
Liquid droplets
C.
Ice crystals
D.
Carbon dioxide
Correct Answer:
Liquid droplets
Explanation:
Guttation involves the release of water as liquid droplets rather than as water vapour.
3. Guttation commonly occurs through specialized structures called:
A.
Stomata
B.
Lenticels
C.
Hydathodes
D.
Root hairs
Correct Answer:
Hydathodes
Explanation:
Hydathodes are specialized structures, generally located at leaf margins or tips, through which guttation takes place.
4. Where are guttation droplets most commonly seen on a leaf?
A.
At the leaf margins or tips
B.
Only on the central vein
C.
Inside the chloroplasts
D.
At the base of the stem
Correct Answer:
At the leaf margins or tips
Explanation:
Guttation droplets usually appear at the margins or tips of leaves, where hydathodes are commonly present.
5. Which statement correctly describes guttation?
A.
It is the release of liquid water from leaves
B.
It is the uptake of water by roots
C.
It is the conversion of water into sugar
D.
It is the release of oxygen from leaves
Correct Answer:
It is the release of liquid water from leaves
Explanation:
Guttation is specifically the release of liquid water from the leaves of a plant.
6. Guttation should not be confused with transpiration because guttation involves:
A.
Water loss as liquid droplets
B.
Water loss only as vapour
C.
Food loss from roots
D.
Mineral absorption by leaves
Correct Answer:
Water loss as liquid droplets
Explanation:
Guttation involves liquid water droplets, whereas transpiration involves the loss of water in the form of vapour.
7. The small drops of water observed on leaf edges early in the morning are usually an example of:
A.
Guttation
B.
Photosynthesis
C.
Respiration
D.
Pollination
Correct Answer:
Guttation
Explanation:
Water droplets appearing at leaf edges, especially under suitable conditions, are characteristic of guttation.
8. Which plant part is directly associated with the visible water droplets in guttation?
A.
Leaf margin
B.
Flower petal
C.
Root cap
D.
Seed coat
Correct Answer:
Leaf margin
Explanation:
Guttation droplets are commonly released at leaf margins or tips through hydathodes.
9. What is the main substance released during guttation?
A.
Liquid water
B.
Water vapour
C.
Starch
D.
Oxygen gas
Correct Answer:
Liquid water
Explanation:
The defining feature of guttation is the release of liquid water from specialized leaf structures.
10. Guttation is best defined as:
A.
The exudation of liquid water from leaf margins or tips
B.
The evaporation of water from the entire plant
C.
The movement of food from leaves to roots
D.
The absorption of carbon dioxide by leaves
Correct Answer:
The exudation of liquid water from leaf margins or tips
Explanation:
Guttation is the exudation or outward release of liquid water from leaf margins or tips, usually through hydathodes.
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