Tag: morphology of leaf
Questions Related to morphology of leaf
Monocot leaf can be distinguished from the dicot
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Stomata is equally distributed on both lower and upper epidermis
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Palisade cells on both upper and lower sides
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Several veins of nearly uniform size
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All of the above
| Monocot leaf | Dicot leaf |
|---|---|
| (i) The monocot leaf is of isobilateral symmetry. | The dicot leaf is of dorsiventral symmetry. |
| (ii) The bullifom cells are present on the upper epidermis. | The bulliform cells are absent. |
| (iii) Stomata are equally distributed on both surfaces. | Stomata are present more in lower surface and few on upper surface. |
| (iv) In mesophyll cells, only spongy parenchyma is present with small intercellular spaces. | Mesophyll cells are made up of palisade parenchyma and spongy parenchyma with large intercellular spaces. |
| (v) Bundle sheath is made up of parenchyma and just above and below sclerenchymatous cells are found. | Bundle sheath is made up of parenchyma and just above and below the parenchymatous or collenchymatous cells are found. |
Cuticle is made up of
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Glycerol and hydrocarbon polymers impregnated with wax
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Lipid and hydrocarbon polymers impregnated with wax
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Fatty acid and hydrocarbon polymers impregnated with wax
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None of the above
A mature angiosperm that bears only one leaf is
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Welwitschia
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Monophyllea
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Raffiesta
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Betula
Plant with single leaf, Monophyllea (angiosperm) plant with two leaves only Welwitschia (gymnosperm).
Presence of sheathing leaf base and ligule are characteristic of
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Cycas leaf
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Fern leaf
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Banana leaf
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Grass leaf
A ligule is an outgrowth present at the junction of leaf sheath and lamina in grass leaf. It occurs at the end of petiole at the leaf base. It is a strap-shaped extension of the corolla. It is a membranous appendages. Grass leaf also has sheathing leaf base.
A leaf without petiole is
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Sessile
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Subsessile
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Subpetiolate
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Simple
Petiole is a stalk that attaches a leaf to the stem of a plant. A leaf without petiole is called as sessile leaf. It is a transition between the stem and the lamina.
Smallest leaf occurs in
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Victoria
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Wolffia
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Cycas
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Spiraea
The smallest leaf occurs in Wolffia. In Wolffia, the leaf is fused with the stem to form minute flat thallus. Thus, the correct answer is 'Wolffia.'
Largest number of chloroplasts in the leaf is in.
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Spongy tissue
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Palisade tissue
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Guard cells
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Bundle sheath
A. Spongy tissue – parenchyma with less number of chloroplast.
B. Palisade tissue – parenchyma with more number of chloroplast.
C. Guard tissue – modified epidermal cells with chloroplast, present in the stomata.
D. Bundle sheath – Thick walled parenchymatous sheath present around the vascular bundles in leaves.
So, the correct option is ‘Palisade tissue’.
Petiole part of the leaf is also known as
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Epipodium
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Mesopodium
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Hypopodium
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None of the above
The foliage leaf consists of three parts, namely leaf base, petiole and lamina. The leaf base is also called as hypopodium. The petiole part of the leaf is also called as mesopodium. The lamina part of the leaf is called as epipodium.
Which one of the following possesses winged petiole?
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Citrus
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Bombax
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Acacia
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Asparagus
Winged petiole is the petiole in which there is a thin flange of tissue along the length of the petiole. It is a green flattened petiole. Plants like Citrus and Dionaea possess winged petiole. Thus, the correct answer is 'Citrus.'
Approximate diameter of Victoria leaf is
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$1$m
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$1.3$m
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$2$m
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$3$m
The largest leaf belongs to Victoria regia in plant kingdom. The approximate diameter of Victoria leaf is 1.3 meter. It is an aquatic plant. It has a floating leaves.