Tag: plant kingdom

Questions Related to plant kingdom

Which one of the following pairs of plants bears sporangia with two different types of spores?

classification of pteridophytes kingdom plantae plant kingdom biology

  1. Selaginella and Equisetum

  2. Equisetum and Pteridium

  3. Selaginella and Marselia

  4. Pteriodium and Marselia

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Correct Option: A

Selaginella has a character of evolutionary importance, which is presence of?

classification of pteridophytes kingdom plantae plant kingdom biology

  1. Seed

  2. Heterospory

  3. Strobilus

  4. Rhizophore

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Correct Option: B
Explanation:

Because Selaginella has both microspores and megaspores, the plant is called as heterosporous. The other fern-allies are homosporous (having only one type/size of spore). This significance of this advance in evolution is important because sexual dimorphism is being expressed much earlier in the life cycle. The organisms to appeared next this are all heterosporous.

Therefore, the correct answer is option B.

Which of the following pteridophytes that inhabit desert regions are popularly known as 'resurrection plants'?

classification of pteridophytes kingdom plantae plant kingdom biology

  1. Horneophyton

  2. Asteroxylon

  3. Selaginella

  4. Rhynia

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Correct Option: C
Explanation:

A resurrection plant is any poikilohydric plant that can survive extreme dehydration, even over months or years. Selaginella lepidophylla, is known as resurrection plant or birds nest moss as it shows ball like appearance (cespitose habit) in dry season. It is a plant species native to North America, Central and South America, and sold as a novelty.

Thus, the correct answer is option C.

Which one is heterosporous?

classification of pteridophytes kingdom plantae plant kingdom biology

  1. Dryopteris

  2. Adiantum

  3. Salvinia

  4. Equisetum

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Correct Option: C
Explanation:

Heterospory means the production of two spores of different sizes and of two different development patterns. Small spore is called microspore and large spore is called megaspore. Microspore produces the male gametophyte that possesses male sex organs while megaspore produces the female gametophyte that possesses female sex organs. It ultimately leads to seed development. For example, Selaginella, Salvinia, Azolla. Dryopteris and Adiantum are homosporous and haploid spores are produced in each sporangium. 

Thus, the correct answer is option C.

Match List I with List II and select the correct answer.

List I List II
a. Trabeculae of Selaginella $1$. Endodermal in nature
b. Trabeculae of Marsilea $2$. Cortical in nature
c. Trabeculae of soetes $3$. Sporogenous in nature
d. Trabeculae of Funaria $4$. Amphithecia in nature
classification of pteridophytes kingdom plantae plant kingdom biology

  1. A-$1$, B-$2$, C-$3$, D-$4$

  2. A-$3$, B-$2$, C-$4$, D-$1$

  3. A-$1$, B-$3$, C-$4$, D-$2$

  4. A-$4$, B-$3$, C-$1$, D-$2$

Show answer
Correct Option: A

Match List-I (Groups of plants) with List II(Characters present) and select the correct answer.

List-I List-II
a. Psilopsida $1$. Sporangiophore
b. Lycopsida $2$. Megaphyllous leaf
c. Sphenopsida $3$. Rootless plants
d. Pteropsida $4$. Companion cells
$5$. Single sporangium on the ad axial surface of a isopropyl
classification of pteridophytes kingdom plantae plant kingdom biology

  1. A-$3$, B-$1$, C-$4$, D-$2$

  2. A-$3$, B-$5$, C-$1$, D-$2$

  3. A-$1$, B-$3$, C-$4$, D-$5$

  4. A-$2$, B-$5$, C-$1$, D-$3$

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Correct Option: A

Prothallus of Dryopteris is a ................ . It bears archegonia on the ................... side. 

classification of pteridophytes kingdom plantae plant kingdom biology

  1. Sporophyte, dorsal

  2. Sporophyte, ventral

  3. Gametophyte, dorsal

  4. Gametophyte, ventral

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Correct Option: D
Explanation:
  • Spore is uninucleate haploid spherical structure.
  • The spore germinates into gametophyte known as prothallus.
  • Prothallus has archegonia present on the ventral side.
  • Hence, the Prothallus of Dryopteris is a Gametophyte.  It bears archegonia on the ventral side. 
  • So, the correct answer is 'Gametophyte, ventral'.

Placenta in Dryopteris is

classification of pteridophytes kingdom plantae plant kingdom biology

  1. The place of attachment of ramenta

  2. The place of attachment of sporangia

  3. The place from where rhizoids arise

  4. The place of attachment of archegonia

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Correct Option: B
Explanation:

In the life cycle of Dryopteris, the asexual sporophyte is the dominant individual. This is perennial and evergreen and differentiates into rhizome (stem), roots and leaves ( fronds). When the fronds mature these become fertile and are called as sporophylls since they contain sori. In each sorus stalked sporangia is present arising from the placenta, the swollen outgrowth on the divisions of the pinna or leaflets.

So, the correct answer is option B.

The number of neck canal cells in the archegonium of Selaginella is

classification of pteridophytes kingdom plantae plant kingdom biology

  1. One

  2. Four

  3. Two

  4. Six or more

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Correct Option: A
Explanation:

The archegonium which develops from a single superficial cell of prothallus is the archegonial initial found just back of the apical meristem. The archegonia  are sessile and embedded. The archegonial initially divides to give 4+4 cells which make up the neck. The neck has a single neck canal cell.

The fertile branch portion of Selaginella is called as

classification of pteridophytes kingdom plantae plant kingdom biology

  1. Rhizophores

  2. Spores

  3. Strobili

  4. All of the above

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Correct Option: C
Explanation:

Strobilus is called the fertile branch, because it bears the reproductive structures such as microsporophylls and megasporophylls.