Q51. When stamens are united in one bundle, the condition is called:
[A] Polyadelphous
[B] Diadelphous
[C] Monadelphous
[D] Syngenesious
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Correct Answer: [C] Monadelphous
Explanation: Monadelphous condition is when the filaments of stamens are fused together into one bundle, while anthers are free, e.g., in china rose. Diadelphous has stamens united in two bundles (pe[A], polyadelphous in more than two bundles (citrus), and syngenesious has anthers fused and filaments free (sunflower).
Q52. When carpels are fused together, the gynoecium is said to be:
[A] Apocarpous
[B] Syncarpous
[C] Monocarpellary
[D] Multicarpellary
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Correct Answer: [B] Syncarpous
Q53. When carpels are free, the gynoecium is said to be:
[A] Syncarpous
[B] Apocarpous
[C] Polycarpellary
[D] Multilocular
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Correct Answer: [B] Apocarpous
Q54. Placentation refers to:
[A] Arrangement of placentae in ovary
[B] Arrangement of ovules within the ovary
[C] Arrangement of flowers on placenta
[D] Arrangement of fruits on placenta
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Correct Answer: [B] Arrangement of ovules within the ovary
Q55. In marginal placentation, the placenta forms a ridge along the:
[A] Ventral suture of the ovary
[B] Dorsal suture of the ovary
[C] Base of the ovary
[D] Apex of the ovary
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Correct Answer: [A] Ventral suture of the ovary
Q56. In axile placentation, ovules are attached to:
[A] Ovary wall
[B] Central axis in a multilocular ovary
[C] Base of the ovary
[D] Free central column
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Correct Answer: [B] Central axis in a multilocular ovary
Q57. In parietal placentation, ovules develop on the:
[A] Central axis
[B] Ovary wall or peripheral part
[C] Base of ovary
[D] Septa in ovary
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Correct Answer: [B] Ovary wall or peripheral part
Q58. In free central placentation, ovules are borne on:
[A] Central axis without septa
[B] Ovary wall
[C] Base of ovary
[D] Septa of ovary
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Correct Answer: [A] Central axis without septa
Q59. In basal placentation, the placenta develops at the:
[A] Base of the ovary
[B] Apex of the ovary
[C] Periphery of the ovary
[D] Center of the ovary
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Correct Answer: [A] Base of the ovary
Q60. Fruit develops from the:
[A] Thalamus
[B] Ovule
[C] Ovary
[D] Seed
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Correct Answer: [C] Ovary
Explanation: Fruit is the mature or ripened ovary, developed after fertilization. The ovary wall forms the pericarp of the fruit. Thalamus forms false fruits in some cases, ovule develops into seed, and seed gives rise to new plant.