Tag: botany

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Questions Related to botany

Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

Which group of plants is called as vascular cryptogams?

  1. Pteridophyta

  2. Bryophytes

  3. Algae

  4. Fungi
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Vascular cryptogam is an old botanical phrase and it refers to those vascular plants that do not make seeds. Thus, cryptogam refers to the production of a separate, usually very small, archegoniate gametophyte. These are well represented in the fossil record.

Thus, vascular cryptogams are pteridophytes.

Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

Pteridophytes differ from bryophytes in having

  1. Vascular tissues

  2. Archegonia

  3. Motile sperms

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Bryophyta:
1. The main plant body is a gametophyte and haploid.
2. True roots and leaves are absent.
3. Vascular tissue is absent.
4. Archegonia with a long neck having 6 vertical rows of cells.
5. The sporophyte is capsular and totally dependent on the gametophyte.
Pteridophyta:
1. The main plant body is a sporophyte and diploid.
2. True roots and leaves are present.
3. Vascular tissue is present.
4. Archegonia with a short neck having 4 vertical rows of cells.
5. The sporophyte is differentiated to root, stem and leaves and is initially dependent on the gametophyte.
Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

All of these are the characters of angiosperms except they

  1. Are most advanced

  2. Bear true fruits

  3. Bear covered seeds

  4. Are cryptogams

  5. Show double fertilization
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Cryptogams are plants, that reproduce by spores without flowers or seeds but angiosperms possess flowers and seeds. Angiosperms are more advanced than the gymnosperms. They consist of covered seeds as compared to the naked seeds of the gymnosperms. Angiosperms bear true fruits. They show characteristics of double fertilization.

Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

Gametophyte embeded in sporophyte in

  1. Bryophyta

  2. Pteridophyta

  3. Cryptogams

  4. Spermatophyta
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The spermatophyta comprises of all those land plants that produce flowers and seed. In angiosperms, and other seed plants, gametophytes are not independent seed plants, instead they are small structures found embedded within the sporophyte.

Therefore, the correct answer is option D.

Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

Plants reproducing by spores such as mosses and ferns are grouped under the general term

  1. Cryptogams

  2. Bryophytes

  3. Sporophytes

  4. Thallophytes
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cryptogams refer to the plants and fungi that do not reproduce by seeds. Besides these, the cryptogams are also known to reproduce by means of spores. All spore producing plants including mosses and ferns do not reproduce by seeds are hence, known as cryptogams.

Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

Which one of the following is called as horsetail?

  1. Lycopodium

  2. Marsilia

  3. Equisetum

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

The name horsetail, often used for the entire group, arose because the branched species somewhat resemble a horse's tail. 
Equisetum is the only living genus in Equisetaceae, a family of vascular plants that reproduce by spores rather than seeds.
Equisetum is a "living fossil" as it is the only living genus of the entire class Equisetopsida, which for over one hundred million years was much more diverse and dominated the understory of late Paleozoic forests. Some Equisetopsida were large trees reaching to 30 meters tall.

Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

Cryptogams are

  1. Flowering plant

  2. Flowerless plants, seedless plants or lower plants

  3. Higher plants

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A cryptogam is a plant  that reproduces by spores and it is without flowers or seeds. Cryptogamae means hidden reproduction which refers to the fact that no seed is produced, thus cryptogams represent the non-seed bearing plants. Other names, such as "thallophytes", "lower plants", and "spore plants" are also occasionally used.

Cryptogams are the opposite of the Phanerogamae or Spermatophyta the seed plants.
Therefore, the correct answer is option B.

Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

If seed is defined as a modified ovule as a result of fertilization, one may expect to find such seed in

  1. All vascular plants

  2. Angiosperm only

  3. Gymnosperm only

  4. Phanerogams
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The phanerogams are the plants which can produce seeds. These are the plants which possess ovule where the fertilisation of male and female gametes takes place to form the zygote. The ovule is transformed into the seed after fertilisation. So, the seeds can be observed in the phanerogams. 

Thus, the correct answer is option D. 

Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

Ectophloic siphonostele occurs in ___________________.

  1. Marsilea and Botrychium

  2. Dicksonia and Maiden Hair Fern

  3. Osmunda and Equisetum

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

Ectophloic siphonostele, where the phloem is restricted to the outer surface of the xylem, is a characteristic feature found in Osmunda and Equisetum.

Multiple choice botany kingdom plantae introduction to pteridophytes cryptogams pteridophyta pteridophytes

Which group of plants among the following were the first to develop into an independent sporophytic generation?

  1. Bryophytes

  2. Pteridophytes

  3. Gymnosperms

  4. Angiosperms
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The plants exhibit the alternation of generations in their life cycle. The lower plants have a dependent sporophytic generation of the gametophyte. The first plants to develop as an independent sporophytic generation are the pteridophytes. These are the vascular plants which can survive in the terrestrial areas and has a independent diploid sporophytic stage. 

Thus, the correct answer is option B.