Tag: botany

Questions Related to botany

The heart shaped fern prothallus is _________

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Gametophyte

  2. Sporophyte

  3. Saprophyte

  4. Gamete

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Correct Option: A
Explanation:

The heart-shaped prothallus is the characteristic feature of ferns and mainly belong to Polypodiaceae. They show polarity and dorsoventrally. The prothallus contains both the antheridia and archegonia which are embedded in the prothallus. Since it forms the male and female gametes the prothallus -is considered as the gametophyte.

Pteridophytes are ______ while phanerogams are ________

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Non Flowering, Flowering

  2. Flowering, Non flowering

  3. Gymnosperm, Angiosperm

  4. Monocot, Dicot

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Correct Option: A
Explanation:

Pteridophytes are cryptogamae, they are Non-flowering plants whereas phanerogams are flowering plants and are further classified as monocots and Dicots.

"Monkey's puzzle" is a common name for ______________.

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Araucaria imbricata

  2. Cycas revolute

  3. Pinus longifolia

  4. Gnetum gonen

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Correct Option: A

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

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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

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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

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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

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Correct Option: A
Explanation:

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