Tag: cryptogams

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Questions Related to cryptogams

Multiple choice biology pictorial feature of plant kingdom uses of bryophytes introduction to bryophytes 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.

  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.
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

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

  1. Psilotum, Lycopodium, Pteris and Adiantum

  2. Selaginella, Salvinia, Lycopodium and Pteris

  3. Salvinia, Lycopodium, Selaginella and Psilotum

  4. Salvinia, Selaginella, Azolla and Lycopodium
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Heterospory and heterophily are advanced traits found in genera like Selaginella, Salvinia, and Azolla. Psilotum, Lycopodium, Pteris, and Adiantum are generally homosporous and do not exhibit these traits.

Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

Which statement is correct for homosporus pteridophyta ?

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In homosporous pteridophytes, the gametophyte (prothallus) is typically small, independent, and autotrophic, while the sporophyte is the dominant, independent, and autotrophic phase. Option A correctly identifies the autotrophic nature of the gametophyte.

Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

The plants with primitive vascular tissue are called

  1. Bryophytes

  2. Pteridophytes

  3. Angiosperms

  4. Gymnosperms
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.
Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

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

  1. Equisetum

  2. Fern

  3. Lycopodium

  4. Psilotum
Reveal answer Fill a bubble to check yourself
A Correct answer
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. 

Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

Which group of plants is called as vascular cryptogams?

  1. Pteridophyta

  2. Bryophytes

  3. Algae

  4. Fungi
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

Pteridophytes differ from bryophytes in having

  1. Vascular tissues

  2. Archegonia

  3. Motile sperms

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
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.
Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

All of these are the characters of angiosperms except they

  1. Are most advanced

  2. Bear true fruits

  3. Bear covered seeds

  4. Are cryptogams

  5. Show double fertilization
Reveal answer Fill a bubble to check yourself
D Correct answer
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.