Question

Which is absent in Asteraceae?
A. Cypsela Fruit
B. Capitulum Inflorescence
C. Hypogynous flowers
D. Syngenesious anthers
E. Pappus Calyx

Answer 1

Hint: Asteraceae is also known as Compositae, is a vast and widely spread family of flowering plants. It includes sunflower, Daisy, aster etc. The flowers of this family are economically very important as it provides cooking oil, sunflower seeds, sweetening agents, leafy vegetables, herbal tea and many more.

Complete answer:The Asteraceae family are generally annual or perennial. It includes a significant number of shrubs, vines and trees. This family has a cosmopolitan distribution ranging from polar regions to tropical regions. The largest distribution of species is found in arid and sub-arid regions of subtropical and lower temperate latitude. Cypsela is a single-seeded dry fruit that does not slit open from seed dispersal and is formed from a double ovary, in which the only one of the ovules develops into a seed. This cypsela fruit is only found in Asteraceae or Composite family. Thus, the first option given is correct.
The Inflorescence found in Asteraceae is Capitulum Inflorescence. In this Inflorescence, there are close-packed flowers which have no stalks and have flattened axis. This type of Inflorescence is characteristic of the Asteraceae family. Thus the second option is also correct. The flowers found in Asteraceae are epigynous and not hypogynous. Thus the third option is incorrect. And in this family the anther is syngenesious which means stamens are fused together at the edges by only the anther, thus forming a ring around gynoecium. And the Pappus calyx is also found in Asteraceae.

So the right answer is option C (Hypogynous Flowers).

Note:
This family is considered as the most advanced and highly evolved and occupies the highest position in the plant kingdom. Rubber is also obtained from a particular species of Asteraceae Family. The flowers from this family are generally ornamental flowers.