Tag: morphology of leaf
Questions Related to morphology of leaf
Parallel venation is observed mostly in
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Monocot plants
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Dicot plants
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Thallophytes
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Bryophytes
In a leaf with reticulate venation
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Veins forms a network on the leaf
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Veins run parallel to the midrib
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Veins run horizontal to the midrib
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Veins criss-cross each other in an irregular pattern
Venation is the arrangement of veins in a leaf. In reticulated venation, veins are interconnected and form a web-like network. There is a prominent vein called the midrib from which many small veins arise which finally form a net like structure in the lamina. This kind of venation is seen in dicots.
In a leaf with parallel venation
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Veins form a network on the leaf
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Veins run parallel to the midrib
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Veins run horizontal to the midrib
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Veins crisscross each other to from an irregular pattern
Venation is the arrangement of veins in a leaf. Parallel venation is where the secondary veins run parallel to each other and are connected laterally by minute and straight veinlets. This type of venation is mostly seen in monocots.
Parallel venation is a characteristic of moncots. which of the following is an exception to this generalization?
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Smilax
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Colocasia
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Alocasia
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All of these
In case of parallel venation, the veins run parallel to each other and network is not formed. This type of venation is the characteristic feature of monocots. There are few exceptions, e.g., Smilax, Colocasia, Alocasia, Dioscorea, etc.
Correct option is D.
Venation is a term used to describe the pattern of arrangement of
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Floral organs
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Flower in inflorescence
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Veins and veinlets in a lamina
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All of the above
Correct option C.
Which one of the following is correct?
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In dorsiventral leaf, stomata are on lower (abaxial) surface.
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Protoxylem disintegrates to produce lacuna (lysigenous) in monocot stem.
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Reticulate venation in dicot leaf, parallel venation in monocot leaf.
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All of the above
In a plant, the following part performs photosynthesis
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Leaves
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Stem
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Roots
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Root nodules
The leaves of the plant possess the mesophyll tissue which contains the cellular organelle chloroplast. This organelle contains the chlorophyll pigments which are responsible for the absorption of light and conversion of this energy to synthesize food by the process of photosynthesis.
In Indian spinach, leaves are modified to
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Provide support
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Provide protection
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Provide additional air
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Store food and water
In spinach, leaves have modified functions. They are modified to store food and water. They store their food in leaves. So, leaves of spinach are a rich source of nutrition and are frequently consumed.
The leaf in which the stomata remains confined to upper surface of the leaf is known as
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Amphistomatic
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Epistomatic
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Hypostomatic
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All of the above
Amphistomatic: A leaf is said to be called as amphistomatic when the stomata are present on both the side of the leaf.
A leaf having undivided lamina with an axillary bud in its axil is called
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Compound leaf
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Simple leaf
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Lamina leaf
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None of the above
A simple leaf has a single leaf blade or lamina inserted into the petiole. It may have incisions but these incisions do not divide the blade into leaflets. It shows the presence of an axillary bud at its axil. For example mango.