Why Pteridophytes is normally found in damp and shady habitats?

Why Pteridophytes is normally found in damp and shady habitats?

Ans: Pteridophytes and bryophytes prefer moist and shady places for their growth mainly of three reasons. To conserve water, for reproduction and to avaoid damage due to sunlight. The common examples of pteridophytes and bryophytes are ferns and mossess.

Why are Pteridophytes common in moist and damp areas?

Pteridophytes are more common in humid places because they depend on water for their gametes to fertilize one another. In humid environments, their reproduction is more intense and they proliferate.

Why are Pteridophytes reliant on moist environments?

Like the bryophytes, ferns and fern allies are still restricted to moist habitats. Their flagellated sperm need a thin film of water to swim between the antheridium and the archegonium. And when the baby sporophyte grows up from the gametophyte, it is exposed to desiccation (drying up).

Why do ferns need to live in damp conditions?

The movement of spores requires a thin film of water. This is the main reason for ferns living in a moist environment. Water helps the spore to travel from Antheridium to Archegonium. In fact, all types of ferns and other related species need some sort of moisture to reproduce and grow.

Why do bryophytes Pteridophytes grow in moist and shady places?

Plants like bryophytes and pteridophytes are usually very delicate and cannot withstand sun rays. So they prefer growing in moist shady places. Moreover these plants reproduce by spore formation. Thus moist and humid places are appropriate for the growth of these plants.

Why must mosses and ferns live in moist environments?

Why must mosses and ferns live in environments that are wet during at least part of the year? Bryophytes also need a moist environment to reproduce. Their flagellated sperm must swim through water to reach the egg. So mosses and liverworts are restricted to moist habitats.

Why do pteridophytes need water?

It requires immersion in surface water for conduction and movement of sperms. The sprophyte (foot, seta and capsule) is lodged on the gametophyte: But in pteridophytes the gametophyte and sporophyte establish as separate plants. The sporophyte is a typical vascular plant drawing soil water through true roots.

Why are ferns dependent on water?

Ferns require water to enable the movement of the sperm to reach the egg. A zygote is a combination of genetic material from both the egg and sperm and contains a complete set of DNA to form a new fern plant.

Why do mosses live in moist environments?

Mosses can only survive in the water as it is lacking a vascular system, unlike other plants. So mosses can’t transport water and mineral to its various parts instead they rely on osmosis to allow a cell to cell transport, so being in damp areas would be beneficial for them.

Why do ferns and mosses live in damp areas?

What are the economic importance of Pteridophytes?

Pteridophytes commonly known as Vascular Cryptogams, are the seedless vascular plants that evolved after bryophytes. Besides being a lower plant, pteridophytes are economically very important. Dry fronds of many ferns are used as a cattle feed. Pteridophytes are also used as a medicine.

What are plants grow in moist and shady places?

Plants for Damp Shade

• Fritillaria meleagris. Fritillaria meleagris, common name Snake’s Head Fritillary, is a lovely delicate bulb which flowers in spring and has chequered bell like flowers in shades of purple and F.
• Hellebores.
• Pulmonarias.
• Cornus.
• Alchemilla mollis.
• Thalictrum.
• Astilbe.
• Meconopsis.

Where are the pteridophytes found in the world?

The pteridophytes are found in cool, damp, shady places though some may flourish well in sandy ­soil conditions. In pteridophytes, the main plant body is a sporophyte which is differentiated into true root, stem and leaves. These organs possess well ­differentiated vascular tissues.

When does a sporophyte form in a pteridophyte?

Once the fusion of the gametes occurs, a zygote is formed. This zygote produces the sporophyte, after division. When the spores of the plants are similar then these plants are called homosporous plants.

What kind of leaves does a Pteridophyta have?

The leaves in pteridophyta are small (microphylls) as in selaginella or large (macrophylls) as in ferns. The sporophytes bear sporangia that are subtended by leaf like appendages called sporophylls.

How are gametes produced in a pteridophyte?

Pteridophytes show a true alternation of generations. Here, the dominant sporophyte produces spores through meiosis. The gametophyte generation forms gametes by mitosis. The spores are produced by the sporangia in the spore mother cells. These spores germinate and give rise to gametophytes.