Question

Difference between angiosperms and gymnosperms class 11

Answer 1

Angiosperms and gymnosperms are seed bearing plants. They have natural ability to produce seeds surrounded by nutritive tissue and coated with a seed coat.Gymnosperm plants were present 200 million years before the angiosperm plants.

The main difference between angiosperms and gymnosperms is the diversity. The diversity of angiosperm are greater than the gymnosperm. The higher diversity indicated the angiosperms are adaptive to terrestrial ecosystems. Another characteristic of angiosperms is the flowers and production of fruits. But, in gymnosperms seed are not included in a fruit.

Answer 2

Answer:

Gymnosperm

1. In gymnosperms the reproductive structures are cones which are unisexual

2. The ovules are exposed, i.e., they are not located in the ovary.

3. After fertilization, the ovules develop into naked seeds.

4. The microspores and megaspores are produced by male and female cones

5. The pollen grains fall and germinate directly on the micropyle of the ovules

6. Fertilization is simple

7. Endosperm is haploid

8. In gymnosperms the pollination is by wind alone

9. In gymnosperms, generally the xylem contains only tracheids. Vessels are absent

10. The phloem has no companion cells

Angiosperms

1. In Angiosperms, the flowers are the reproductive organs and they may be both unisexual and bisexual.

2. The ovules are enclosed in the ovary.

3. After fertilization, the ovules develop into seeds inside the fruit.

4. The microspores are produced in anthers while the megaspores are produced in ovules of the ovary in flowers

5. The pollen grains fall on the stigma, germinate and the pollen tube carries the male gamete to the ovary

6. Fertilization is double

7. Endosperm is triploid

8. In angiosperms, different agents like wind, insects, bats etc are involved in pollination

9. Angiosperms vessels are always are present

10. Companion cells are present.