Question

what are gymnosperms list detector 6 features

Answer 1

Gymnosperms (gymnos - naked, sperma = seed) are naked - seeded plants. Here the ovules are not enclosed and thus the seeds remain naked.

2. Most of the gymnosperms are evergreen, woody perennials with shruby or tree like habit. They show xerophytic characters.

3. The main plant body is a well differentiated sporophyte consisting of root, stem and leaves. Gametophyte is reduced and is dependent on sporophyte.

4. Plants possess well developed root system.

5. Leaves are of two types i.e. foliage leaves and scale leaves.

6. Vascular bundles are conjoint, collateral, open and endarch.

7. Xylem consists of only tracheids.

8. Vessels are absent except in Gnetum.

9. Companion cells are absent.

10. Secondary growth takes place both in roots and stems.
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Answer 2

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Subkingdom Phanerogamae➫ A division of plants comprising those having reproductive organs.

➧ Subkingdom Phanerogamae is divided into Two Groups:-▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃⤵

❶❫ Gymnosperms:-▬▬▬▬▬▬▬▬▬▬☟

①❭ They do not produce flowers.

②❭ Seeds are naked.

③❭ Endoderm is haploid.

④❭ 0vules are not located in the 0vary.

⑤❭ Level of all evolution is primitive group of seed-bearing plant.

⑥❭ Xylem lacks vessels & Phloem lacks companion cell.

▶Ex:- Cycas & Pinus

❷❫ Angiosperms:-▬▬▬▬▬▬▬▬▬▬☟

①❭ They produce flower & seeds.

②❭ Seeds are enclosed by the fruit wall.

③❭ Endotherms is triploid.

④❭ 0vules are enclosed in the 0vary.

⑤❭ Level of evolution is highly evolved seed-bearing plant.

⑥❭ Xylem contains vessels & Phloem contains companion cell.

▶Ex:- Mangoes & Apples

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