Question

27. Which of the following is incorrect?
(A) The petioles in Australian Acacia expands, become green and synthesis food.
(B) Pattern of arrangement ofleaves on stem is opposite in sunflower and Alstonia.
(C) When a shoot tip transforms into a flower, it is always solitary
D) ovules are borne in central axis and septa are absent in dianthus and primrose
E) In solanaceae gynoecium is bicarpellary symcarpous ovary is superior and placenta are swollen with many ovules​

Answer 1

Answer:

the correct answer is option A.

Explanation:

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.