This set of Plant Biotechnology Multiple Choice Questions & Answers (MCQs) focuses on “Leaf Development”.
1. What is the swollen base of the leaf called?
a) Ovule
b) Anther
c) Pulvinus
d) Winged leaf base
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Explanation: The swollen base of the lead is called as pulvinus which helps in the movement of the leaf and prevents leaf rigidity. It facilitates growth independent movement of the leaf.
2. What is the main function of the leaf?
a) Gaseous exchange
b) Transpiration
c) Cooling
d) Photosynthesis
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Explanation: The main function of the leaf is photosynthesis as it contains chloroplast in it. Chloroplast has a green pigment in it called chlorophyll that takes part in the process of photosynthesis.
3. The whole leaf is modified into a tendril in which of the following?
a) Pisum sativum
b) Mangifera indica
c) Malus sylvestris
d) Lathyrus aphaca
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Explanation: Tendril is a specialized structure in climber plants that provides support and attachment to the plant. Therefore, the leaves get modified to tendril in these plants to perform its function.
4. Unifoliate leaves are palmately compound leaves.
a) True
b) False
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Explanation: Palmately compound leaves appear as a single leaf but multiple leaflets arise from the end which is the petiole. Unifoliate leaves contain a simple leaf blade as a normal leaf with a winged petiole.
5. What is Ramal leaves?
a) Leaves found on branches
b) Leaves found on the node of the stem
c) Leaves develop from the underground stem
d) Leaves without venation
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Explanation: Ramal leaf is the type of leaf that is found on branches. Cauline leaves are found on the node of the stem. Radical leaves develop from the underground stem.
6. The caducous leaf is one of those that fall off in the early stage.
a) True
b) False
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Explanation: Caducous leaf falls off at an early stage. Opuntia is one such plant that sheds its leaf at an early stage. The deciduous leaf falls off at maturity.
7. All leaves have a petiole.
a) True
b) False
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Explanation: All leaves do not have a petiole. Some leaf has petiole which attaches the leaf to the stem whereas some do not have and these leaves are directly attached to the stem and are called sessile leaves.
8. The alternate name of Unicostate venation is ____
a) Pinnate venation
b) Palmate venation
c) Reticulate
d) Parallel
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Explanation: Pinnate venation is also known as unicostate venation. In pinnate venation, there is only one midrib and all the veins arise from the midrib and form a network.
9. The leaf is imparipinnate in _____________
a) Rose
b) Guava
c) Cassia
d) Quisqualis
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Explanation: Imparipinnate is also called as an odd-pinnate leaf. It is a pinnately compound leaves in which there is a lone terminal leaflet rather than a terminal pair of leaflets.
10. In which of the following leaf margin is spiny?
a) Poplar
b) Agave
c) Argemone
d) Bryophyllum
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Explanation: Leaf margin is the boundary that extends along the edge of the leaf. The leaf margin is spiny in argemone. It is so to avoid excess transpiration that is to prevent excess evaporation of water.
Sanfoundry Global Education & Learning Series – Plant Biotechnology.
To practice all areas of Plant Biotechnology, here is complete set of 1000+ Multiple Choice Questions and Answers.
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