Question

थेलोफाइटा एंड टेरिडोफाइटाके बारे में 10 10 प्वाइंट ​

Answer 1

Answer:

Thallophytes- (includes algae and fungi)

-Main plant body Gametophyte (haploid).

-Zygotic meiosis is characteristic feature of thallophytes.

-Don't form embryo in their life cycle.

-lifecycle haplontic

Explanation:

Pteridophyta-

Also known as Reptiles of plant kingdom.

Main plant body Sporophyte(diploid).

They are first successful land plants but they need water for fertilisation.

*Adventitious roots.

leafs are knowns as fronds. Two types of leaves sporophylls and tropophylls. Sporangia are present on sporophylls.Tropophylls are for photosynthesis while sporophylls also do photosynthesis ( which is characteristic feature of pterido)

They are the first plant with vascular system .i.e they are also known as tracheophytes.

*Xylem lacks vessels and phloem lack sieve tube elements.

Reproduce through spores.

Spores are inside sporangia. Sporangia are present in clusters on the dorsal surface of leaves known as sori.

They can be homosporous as well as heterosporous( Salvinia,Isoetes, Marsilea).

Multicellular sex organs.

*Male sex organ - Antheridium

*Female sex organ- Archegonium

True Alternation of generation.