Tag: cryptogams

Quizzes (0) Questions (202)

Questions Related to cryptogams

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'.

Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

In ________, a dominant and independent diploid sporophyte alternates with a short-lived, independent haploid gametophyte.

  1. algae

  2. bryophytes

  3. pteridophytes

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

ln pteridophytes, the diploid sporophyte is represented by a dominant, independent, photosynthetic, vascular plant body. It alternates with multicellular, saprophytic autotrophic, independent but short-lived haploid gametophyte.

So the correct option is C.

Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

Which of the following is called as club moss?

  1. Pteris

  2. Lycopodium

  3. Equisetum

  4. Marsilea
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Lycopodium is a genus of clubmosses, also known as ground pines or creeping cedar
They are flowerless, vascular, terrestrial or epiphytic plants, with widely branched, erect, prostrate or creeping stems, with small, simple, needle-like or scale-like leaves that cover the stem and branches thickly. The leaves contain a single, unbranched vascular strand and are microphylls by definition.
Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

Pteridophytes differ from thallophytes and bryophytes in having

  1. Highly differentiated plant body

  2. True roots, stem and leaves

  3. Well defined vascular system

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The body of pteridophytes is differentiated into true stem, leaves and roots like higher plants. They possess well-developed vascular tissues like xylem and phloem for conduction of water and other substances from one part of plant body to another. While the body of thallophytes and bryophytes are not differentiated and lacks vascular system.

Therefore, the correct answer is option D.

Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

Most advanced gymnosperm belongs to

  1. Cycadales

  2. Coniferales

  3. Gnetales

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

The Gnetophyta are a small group of vascular seed plants belonging to the phylum Gnetophyta.
The Gnetophyta include only three genera, Ephedra, Gnetum, and Welwitschia, each of which belongs to a separate family, in a single order, called as the Gnetales. 

The gnetophytes have a number of features in common with the flowering plants (phylum Anthophyta, the angiosperms), which shows that Gnetales are more advanced in gymnosperms.

Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

Which one of the following is a correct statement?

  1. Pteridophyte gametophyte has a protonemal and leafy stage.

  2. In gymnosperms, female gametophyte is free-living

  3. Antheridiophores and archegoniophores are present in pteridophytes.

  4. Origin of seed habit can be traced in pteridophytes.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Bryophytes are an informal group consisting of three divisions of non-vascular land plants: the liverworts, hornworts and mosses. They are characteristically limited in size and prefer moist habitats although they can survive in drier environments. A bryophyte spore germinates and produces an often algal-like mat, called a protonema (plural protonemata) and the leafy or thalloid stage of the gametophyte develops from the protonemal stage. The protonemata are almost always ephemeral but there are exceptions. Amongst the mosses there is a small number of species in which the protonemata are persistent and the leafy plants are ephemeral. The spore was haploid and so are the resulting protonema and the ensuing leafy or thalloid stages.

So the correct option is 'pteridophyta gametophyte has a protonema and leafy stage'.