Question

A characteristic of angiosperms is:
A. Flower
B. Root
C. Seed
D. All of the above

Answer 1

Hint:
Angiosperms are the plants having flowers and endosperm within the seeds. It is responsible for the production of fruit that contain seeds. These plants reproduce through sexual reproduction and bear male and female reproductive parts on the flower.

Complete answer:
Angiosperms and gymnosperms both are seed producing plants. Angiosperms can be differentiated from gymnosperms on the bases of presence of flowers, endosperm within the seeds and the production of fruits having seeds within them.
Stamens of angiosperms are much lighter than the stamens of gymnosperms which helps in pollination. Pollen size of angiosperms is also reduced which decreases time taken to pollination to take place.
Some plants have the unique feature of having a closed carpel which allows only self-pollination. After fertilization, carpel and some surrounding tissues get converted into fruit which provide nutrition to the new developing seed.
As the development of embryos or new individuals take place, within the embryo sac, the sac walls get enlarged and combined with nucleus and start forming a seed coat. The ovary wall present in the female reproductive system develops into fruit or pericarp, whose form is closely linked with the type of seed dispersal system.
Flowers have many diversified fluorescence and structures which makes them attractive and helps in pollination which may involve insects, bees and sometimes air and water.

Note: Flowering plants or angiosperms can be divided into two main categories, that is, monocotyledons which have only one embryonic leaf after germination, example maize and dicotyledons that have two embryonic leaves after germination, example wheat.