Tag: cryptogams

Questions Related to cryptogams

Which one of the following is commonly called a "Maidenhair fern" _____________.

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Pteridium

  2. Adiantum

  3. Dryopteris

  4. Pteris

Show answer
Correct Option: B
Explanation:

Adiantum -Maiden Hair fern ( because of shining,smooth and blackish hair like petioles ).

The number of anthropoids produced from an antheridium of Selaginella is ____________.

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. 64

  2. 256 and above

  3. 25 to 50

  4. 128 to 256

Show answer
Correct Option: D
Explanation:
The male gametophyte of Selaginella has 13 cells, of the 13 cells 1 forms the prothalial cell, 13 jacket cells and 4 androgonial cells. The androgonial cells undergo further divisions to form 128 or 256 flagellate antherozoids.
So, the correct answer is ' 128 to 256'

Jointed green stem occurs in

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Lycopodium

  2. Selaginella

  3. Equisetum

  4. Pteridium

Show answer
Correct Option: C

Lycopodium is

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Heterosporous

  2. Homosporous

  3. Water fern

  4. Both B and C

Show answer
Correct Option: B

In Lycopodium ,the leaves are

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Eligulate

  2. Ligulate

  3. Megaphyllous

  4. Both B and C

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Correct Option: A

Meiosis (reduction division) in pteridophytes takes place at the time of _________________.

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Spore formation

  2. Sexual organ formation

  3. Germination of spores

  4. Gamete formation

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Correct Option: A

Which one of the following characters in not shown by
Selaginella

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Circinate venation

  2. Precocious germination

  3. Microphyllous leaves

  4. Protostele

Show answer
Correct Option: A
Explanation:

Circinate vernation is characteristic feature of division filicophyta  (e.g.,Dryopteris) while Selaginella include in division lycophyta.

Sporangiophores of Equisetum are

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Peltate

  2. Whorled

  3. Stalked

  4. All of the above

Show answer
Correct Option: D

Prothallus represents the

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Gametophytic phase in Pteridophytes

  2. Sporophytic phase of Pteridophytes

  3. Sporophytic phase in Gymnosperms

  4. Sporophytic phase in Angiosperms

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Correct Option: A

Protocorm stage occurs in

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Young gametophyte of Lycopodium

  2. Young gametophyte of Selaginella

  3. Young sporophyte of Selaginella

  4. Young sporophyte of Lycopodium

Show answer
Correct Option: D