Tag: introduction to pteridophytes

Questions Related to introduction to pteridophytes

Pteridophyta do not have

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Roots

  2. Stem

  3. Flowers

  4. Leaves

Show answer
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

Show answer
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

Show answer
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'.

Which statement is not applicable to fertilization in Dryopteris ? 

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Antherozoids are multi-flagellated and spirally coiled

  2. At maturity, neck canal cell and ventral canal cells are degenerated forming malic acid.

  3. Antheroizoids show chemotropic attraction towards malic acid.

  4. After fusion of male and female gamete, diploid oospore is produced inside archegonia.

Show answer
Correct Option: A
Explanation:

Each sperm of antherozoids is spirally coiled (2-3 coils) multiflagellated bearing 40-50 whiplash type flagella which are not applicable to fertilization in Dryopteris.

So the correct option is 'Antherozoids are multi-flagellated and spirally coiled.'

The heterosporous pteridophytes are ______________.

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. Lycopodium and Pteris

  2. Selaginella and Psilotum

  3. Selaginella and Salvinia

  4. Dryopteris and Adiantum

Show answer
Correct Option: C
Explanation:

Heterospory is the production of spores of two different sizes and of two different developmental patterns -smaller male or microspores and larger female or megaspores. Heterospory is the most important evolutionary development in vascular plants because it has ultimately led to seed development, e.g., Selaginella, Salvinia, Azolla, etc.

So the correct option is C.

 Match column I with column II and select the correct options from the codes given below.

Column I Column II
A. Psilopsida  (i) Psilotum
B. Lycopsida (ii) Equisetum
C. Sphenopsida (iii) Selaginella
D. Pteropsida (iv) Dryopteris
botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. A-(i), B-(ii), C-(iii), D-(iv)

  2. A-(i), B-(iv), C-(iii), D-(ii)

  3. A-(i), B-(iii), C-(ii), D-(iv)

  4. A-(i), B-(iii), C-(iv), D-(ii)

Show answer
Correct Option: C
Explanation:

(A) Psilopsida - Psilotum

(B) Lycopsida - Selaginella
(C) Sphenopsida - Equisetum
(D) Pteropsida - Dryopteris
So, the correct answer is (c).

What is common to the following plants: Nepenthes, Psilotum, Rauwolfia, and Aconitum?

botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

  1. All are ornamental plants.

  2. All are phylogenic link species.

  3. All are prone to over exploitation.

  4. All are exclusively present in the Eastern Himalayas.

Show answer
Correct Option: C
Explanation:

Nepenthes is also known as the pitcher plant. It is an insectivorous plant. Psilotum is a pteridophyte and it is used for medicinal purpose. Aconitum is a medicinal plant. Rauwolfia is also a medicinal plant. 


We can see that all the plants have distinctive properties and used due to which these plants are very prone to exploitation. Thus, the one character that is common in all plants is, all these plants are prone to over-exploitation. 
So, the correct answer is 'All are prone to overexploitation'.


So, the correct answer is 'All are prone to overexploitation'.