Tag: pteridophyta

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Questions Related to pteridophyta

Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

Pteridophyta do not have

  1. Roots

  2. Stem

  3. Flowers

  4. Leaves
Reveal answer Fill a bubble to check yourself
C Correct answer
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. 

Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

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

  1. motile male gametes

  2. alternation of generations

  3. antheridia

  4. vascular tissue
Reveal answer Fill a bubble to check yourself
D Correct answer
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'

Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

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

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

Gametophytic plant body is nonvascular in

  1. Algae and liverworts

  2. Mosses and ferns

  3. Gymnosperms and angiosperms

  4. All of these
Reveal answer Fill a bubble to check yourself
A Correct answer
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'

Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

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

  1. mosses

  2. ferns

  3. liverworts

  4. gnetophytes
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.

Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

Which statement is not applicable to fertilization in Dryopteris ? 

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

Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

The heterosporous pteridophytes are ______________.

  1. Lycopodium and Pteris

  2. Selaginella and Psilotum

  3. Selaginella and Salvinia

  4. Dryopteris and Adiantum
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

 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

  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)
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

(A) Psilopsida - Psilotum

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

Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

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

  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.
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.