Tag: cryptogams

Questions Related to cryptogams

Read the given statements and select the correct option. 
Statement 1 : Bryophytes are amphibians of plant kingdom.
Statement 2 : They live in soil but depend on water for sexual reproduction.

biology pictorial feature of plant kingdom uses of bryophytes introduction to bryophytes cryptogams

  1. Both statements 1 and 2 are correct.

  2. Statement 1 is correct but statement 2 is incorrect.

  3. Statement 1 is incorrect but statement 2 is correct.

  4. Both statements 1 and 2 are incorrect.

Show answer
Correct Option: A
Explanation:

Bryophytes are known as 'amphibians of plant kingdom' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes have become adapted to land. But they depend on water for sexual reproduction because the swimming habit is retained by their sperms.

Which of the following set is not show heterospory and heterophily?

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Psilotum, Lycopodium, Pteris and Adiantum

  2. Selaginella, Salvinia, Lycopodium and Pteris

  3. Salvinia, Lycopodium, Selaginella and Psilotum

  4. Salvinia, Selaginella, Azolla and Lycopodium

Show answer
Correct Option: A

In fern sex organ are found on :-

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Protonema

  2. Prothallus

  3. Sporophyte

  4. Sporophyll

Show answer
Correct Option: B
Explanation:

The antheridium (male organ) is located on the lower surface of the fern prothallus and the archegonium (female organ) is located on the upper surface of the fern prothallus.

So, the correct option is 'prothallus'.

Vascular cryptogams are

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Pteridophytes

  2. Angiosperms

  3. Mosses

  4. Algae

Show answer
Correct Option: A
Explanation:

Cryptogams are defined as lower plants or plant-like organisms, that reproduce by spores. Vascular Cryptogams refers to those vascular plants, that do not make seeds.

Which statement is correct for homosporus pteridophyta ?

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Gametophyte is autotrophic, whille sporophyte is parasitic

  2. Gametophyte is semi parasite and sporophyte is autotrophic

  3. Gametophyte and sporophyte are usually parasitic

  4. Sporophyte is autotrophic

Show answer
Correct Option: A

The plants with primitive vascular tissue are called

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Bryophytes

  2. Pteridophytes

  3. Angiosperms

  4. Gymnosperms

Show answer
Correct Option: B
Explanation:
A. Bryophytes are the first land inhabiting or terrestrial plants. They are non vascular, terrestrial, non-flowering and non-seeded plants.
B. Pteridophytes are also known as vascular cryptograms. They are seedless vascular plants which have vascularised root, stem and leaves. 
C. Gymnosperms are the naked seeded plants.
D. Angiosperms are seed bearing and flowering vascular plants which have their seeds enclosed in fruits.
Hence, plants with primitive vascular tissue are called Pteridophytes.
So, the correct answer is 'Pteridophytes'.

The pteridophyte, popularly known as 'horsetail' or a 'scouring rush' is

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Equisetum

  2. Fern

  3. Lycopodium

  4. Psilotum

Show answer
Correct Option: A
Explanation:

Horsetail is in a family of plants containing about 35 species within the genus Equisetum. Scouring rush (Equisetum hyemale) is evergreen, with leafless, hollow, segmented stems with ash-colored bands. Stems grow to about 1/2 inch in diameter and reach up to five feet tall. Because the stems are rough and durable (due to their high silica content), they were called as scouring rushes, because early pioneers used them to scrub pots and pans. 

Which group of plants is called as vascular cryptogams?

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Pteridophyta

  2. Bryophytes

  3. Algae

  4. Fungi

Show answer
Correct Option: A
Explanation:

Vascular cryptogam is an old botanical phrase and it refers to those vascular plants that do not make seeds. Thus, cryptogam refers to the production of a separate, usually very small, archegoniate gametophyte. These are well represented in the fossil record.

Thus, vascular cryptogams are pteridophytes.

Pteridophytes differ from bryophytes in having

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Vascular tissues

  2. Archegonia

  3. Motile sperms

  4. None of the above

Show answer
Correct Option: A
Explanation:
Bryophyta:
1. The main plant body is a gametophyte and haploid.
2. True roots and leaves are absent.
3. Vascular tissue is absent.
4. Archegonia with a long neck having 6 vertical rows of cells.
5. The sporophyte is capsular and totally dependent on the gametophyte.
Pteridophyta:
1. The main plant body is a sporophyte and diploid.
2. True roots and leaves are present.
3. Vascular tissue is present.
4. Archegonia with a short neck having 4 vertical rows of cells.
5. The sporophyte is differentiated to root, stem and leaves and is initially dependent on the gametophyte.

All of these are the characters of angiosperms except they

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Are most advanced

  2. Bear true fruits

  3. Bear covered seeds

  4. Are cryptogams

  5. Show double fertilization

Show answer
Correct Option: D
Explanation:

Cryptogams are plants, that reproduce by spores without flowers or seeds but angiosperms possess flowers and seeds. Angiosperms are more advanced than the gymnosperms. They consist of covered seeds as compared to the naked seeds of the gymnosperms. Angiosperms bear true fruits. They show characteristics of double fertilization.