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Question

Study the following statements and select the correct option.
(A) Buds are present in the axil of leaflets of the compound
leaf.
(B) Pulvinus leaf-base is present in some leguminous plants.
(C) In Alstonia, the petioles expand, become green and
synthesize food.
(D) Opposite phyllotaxy is seen in guava.

A
(B) and (D)
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B
(A) and (C)
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C
(B), (D) and (D)
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D
(A) and (B)
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Solution

The correct option is A (B) and (D)
A swelling at the base of a petiole is known as pulvinus. It is a joint-like thickening at the base of a leaflet. It helps in growth-independent movement. For example, pea and gram. In an opposite leaf arrangement, two leaves arise from the stem at the same level and at the same node but in opposite sides of the stem. For example, guava. A bud is present in the axil of petiole in both simple and compound leaves but not in the axil of leaflets of the compound leaf. In Australian acacia, the leaves are small and are short-lived. The petioles are expanded and green and synthesize food.
Thus, the correct answer is option A.

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