Question

Difference between petridophyta and angieosperm

Answer 1

Answer:

Difference between angiosperms and pteridophytes

1. Angiosperms are adapted to wide variety of environments (may be mesophytes, hydrophytes, xerophytes, epiphytes etc).

Pteridophytes are mostly terrestrial moisture or shade loving plants.

2. Flowers, seeds and fruits are present. Therefore angiosperms are seed bearing plants.

Flowers, seeds and fruits are absent. Therefore pteridophytes are spore bearing plants.

3. Angiosperms vary greatly in size and shape; may be herb, shrub or tree.

Pteridophytes are generally herbaceous.

4. Xylem consists of well developed vessels and tracheids in angiosperms.

Xylem lacks true vessels in Pteridophytes.

5. In phloem, companion cells and sieve tubes are present in angiosperms.

In phloem, sieve cells are present, companion cells and sieve tubes are absent in pteridophytes.

6. In angiosperms, secondary growth is present except monocots.

Secondary growth is absent in pteridophytes.

7. Angiosperms are heterosporous forming male and female spores which is critical for seed habit.

Pteridophytes are mostly homosporous. Some pteridophytes like Selaginella is heterosporous but there is no seed formation.

8. In angiosperms, stamens and carpels are the male and female reproductive structures which are organized to form the flower.

In pteridophytes, antheridium and archegonium are the male and the female sex organs.

9. In angiosperms, water is not essential for fertilization as pollination is siphonogamous (via pollen tube) and gametes are without flagella.

In pteridophytes, water is essential for fertilization and male gametes are ciliated.

10. In angiosperms, megasporangium is usually large.

In pteridophytes, megasporangium is usually small.

Explanation:

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Answer 2

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Flowers, seeds and fruits are present. Therefore angiosperms are seed bearing plants. Flowers, seeds and fruits are absent. Therefore pteridophytes are spore bearing plants.

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