Q31. The arrangement of leaves on a stem or branch is called:
[A] Venation
[B] Vernation
[C] Phyllotaxy
[D] Placentation
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Correct Answer: [C] Phyllotaxy
Q32. Reticulate venation is characteristic of leaves of:
[A] Monocots
[B] Dicots
[C] Pteridophytes
[D] Gymnosperms
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Correct Answer: [B] Dicots
Explanation: Reticulate (net-like) venation is a characteristic feature of dicotyledonous leaves. In reticulate venation, veins and veinlets are irregularly distributed, forming a network or reticulum throughout the lamina. Parallel venation is typical of monocot leaves, where veins run parallel to each other from base to apex. Pteridophytes and gymnosperms have different types of venation patterns.
Q33. Parallel venation is characteristic of leaves of:
[A] Dicots
[B] Monocots
[C] Bryophytes
[D] Gymnosperms
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Correct Answer: [B] Monocots
Q34. When the lamina is completely divided into leaflets, the leaf is called:
[A] Simple leaf
[B] Compound leaf
[C] Pinnately compound leaf
[D] Palmately compound leaf
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Correct Answer: [B] Compound leaf
Explanation: When the leaf lamina is completely divided into distinct leaflets, it is called a compound leaf. In a simple leaf, the lamina is entire or incised, but the incisions do not reach up to the midrib, and it does not divide into leaflets. Pinnately and palmately compound are types of compound leaves, distinguished by leaflet arrangement.
Q35. In which type of compound leaf, the leaflets are attached to a common point at the tip of petiole?
[A] Pinnately compound leaf
[B] Palmately compound leaf
[C] Simple leaf
[D] Decompound leaf
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Correct Answer: [B] Palmately compound leaf
Q36. In a pinnately compound leaf, the leaflets are attached to:
[A] Petiole
[B] Rachis
[C] Petiolule
[D] Pulvinus
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Correct Answer: [B] Rachis
Q37. The swollen leaf base present in leguminous plants is called:
[A] Lamina
[B] Pulvinus
[C] Rachis
[D] Petiole
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Correct Answer: [B] Pulvinus
Q38. Which type of inflorescence is characterized by a main axis that continues to grow indefinitely, and flowers are borne laterally in acropetal succession?
[A] Raceme
[B] Cyme
[C] Umbel
[D] Capitulum
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Correct Answer: [A] Raceme
Q39. In which type of inflorescence, the main axis terminates in a flower, hence having limited growth, and flowers are borne in basipetal succession?
[A] Raceme
[B] Cyme
[C] Spike
[D] Corymb
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Correct Answer: [B] Cyme
Explanation: Cyme is a type of determinate inflorescence where the main axis terminates in a flower, thus limiting its growth. Flowers are borne in basipetal succession (older flowers towards the apex, younger towards the base). Raceme is indeterminate, spike is a type of raceme with sessile flowers, and corymb is a raceme where lower flowers have longer pedicels bringing all flowers to same level.
Q40. Hypogynous flower is characterized by:
[A] Gynoecium occupying the highest position and other floral parts below it
[B] Gynoecium occupying the lowest position and other floral parts above it
[C] Gynoecium and other floral parts at the same level
[D] Gynoecium surrounding other floral parts
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Correct Answer: [A] Gynoecium occupying the highest position and other floral parts below it.