Tag: botany

Questions Related to botany

Sporangiosphores of Equisetum are ___________.

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Peltate

  2. Whorled

  3. Stalked

  4. All the above

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Correct Option: A

Lycopodium is ______________.

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Heterosporous

  2. Homosporous

  3. Water Ferm

  4. Both B and C

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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

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Correct Option: A

Joined green stem occurs in _____________.

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Lycopodium

  2. Saleginella

  3. Equisetum

  4. Pteridium

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Correct Option: A

Pteridophyta do not have

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Roots

  2. Stem

  3. Flowers

  4. Leaves

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Correct Option: C
Explanation:

Pteridophytes comprise of a group of roughly 12,000 species of vascular plants that reproduce via spores and have neither seeds nor flowers, e.g., fern. They differ from mosses by being vascular (i.e., having water-conducting vessels). They have stems and leaves like other vascular plants. 

Sporangiophores of Equisetum are ____________.

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Peltate

  2. Whorled

  3. Stalked

  4. All the above

Show answer
Correct Option: A

Choose the correct answers from the alternatives given.
Pteridophytcs differ from bryophytes in having:

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. motile male gametes

  2. alternation of generations

  3. antheridia

  4. vascular tissue

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Correct Option: D
Explanation:

Bryophytes are known as the amphibians of the plant kingdom and they do not have any true roots stem or leaves.

The pteridophytes are the first terrestrial plants that possess vascular tissues that is the xylem and phloem. 
So, the correct option is 'vascular tissue'

State whether the following statements are true or false.
In pteridophytes, the gametophyte is dominant, while sporophyte is a dependent generation.

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. True

  2. False

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Correct Option: B
Explanation:

Answer B: False
All pteridophytes have a true alternation of generations, in which a dominant sporophyte generation produces spores through meiosis, and a free-living gametophyte generation forms gametes (egg and sperm) by mitosis.

Gametophytic plant body is nonvascular in

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Algae and liverworts

  2. Mosses and ferns

  3. Gymnosperms and angiosperms

  4. All of these

Show answer
Correct Option: A
Explanation:

Algae are chlorophyll bearing, simple, thyroid autotrophic and large aquatic organism. They have a non-vascular body.

Liverworts, being bryophytes, usually grow in moist and shady habitats. The plant body of liverworts is thalloid and nonvascular The main plant body is gametophyte. Ferns, gymnosperms and angiosperms are vascular plants
Hence, the correct answer is 'Algae and liverworts'

The small heart-shaped gametophyte called a prothallus is part of the life cycle of the

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. mosses

  2. ferns

  3. liverworts

  4. gnetophytes

Show answer
Correct Option: B
Explanation:

The gametophyte of ferns and other pteridophytes is known as the prothallus. It is one cell thick, usually heart or kidney shaped and does not have roots, stems or leaves, but it does have rhizoids that anchor it to the soil and help with absorption. Both female (archegonium) and male (antheridium) sex organs are present in the prothallus. 

So, the correct option is 'ferns'.