Question

A characteristic feature of angiosperm is
A. Flowers
B. Root
C. Seed
D. All of the above

Answer 1

In plants, flowers are the organs of sexual reproduction. The process of production of new plants by the fusion of male and female gametes is called sexual reproduction. Flowers are seen only in higher plants and not in lower plants.

Complete answer: Plants reproduce both by sexual and asexual reproduction. In plants, it is called vegetative propagation and the reproduction happens by vegetative parts like stem, root, and leaves. There are several steps for sexual reproduction in plants. In flowers, male and female reproductive organs will be present either in the same flower or in different flowers.
-Male reproductive organs in a flower is called androecium and female reproductive organs are called gynoecium. Androecium consists of stamens and gynoecium consist of carpels. Stamen contains anther and filament. Inside anther, pollen grains are formed by a process called microsporogenesis. The gynoecium consists of carpels and it together forms a pistil. The pistil consists of several parts like stigma, style, and ovary.
-Flowers are the organs of reproduction only in higher plants. Flowering plants are called angiosperms. Plants with well-differentiated structures for reproduction are called phanerogams. Gymnosperms and Angiosperms are called phanerogams as they have specialized structures for reproduction. Plants having poorly differentiated structures for reproduction are called cryptogams. Algae, bryophytes, and pteridophytes are examples of cryptogams. They are the non-flowering plants.
-Seed production is possible in phanerogams. But seeds in gymnosperms are not covered. So, they are called naked seeded plants. In angiosperms, the seed is covered by the fruit.
-Root like structures is seen in lower thalloid plants. So, roots and seeds are not the characteristic features of angiosperms.
Hence, the correct answer is Option A.

Note: Although gymnosperms and angiosperms differ in seed structure and presence of flowers, both have many similarities as well. Both are examples of vascular plants as they have xylem and phloem present. Both gymnosperms and angiosperms produce seed, which germinates to form a new plant.