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Biology
Plant Kingdom
105 questions from 36 papers, each with its answer.
- 105 questions
- 36 papers
- 2.98% of Biology
Pteridophytes Life Cycle
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Given below are the stages in the life cycle of pteridophytes. Arrange the following stages in the correct sequence.
A. Prothallus stage
B. Meiosis in spore mother cells
C. Fertilisation
D. Formation of archegonia and antheridia in gametophyte.
E. Transfer of antherozoids to the archegonia in presence of water.
Choose the correct answer from the options given below:Sequence: Meiosis in SMC (B) -> Prothallus (A) -> Sex organs form (D) -> Flagellated transfer (E) -> Fertilization (C).
In pteridophytes: Spore mother cells in sporangia undergo meiosis (B) to form haploid spores. Spores germinate into a prothallus gametophyte (A). The gametophyte develops antheridia and archegonia (D). Flagellated antherozoids swim through water to archegonia (E), leading to fertilization (C).
Bryophytes Life Cycle
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The correct sequence of events in the life cycle of bryophytes is:
A. Fusion of antherozoid with egg.
B. Attachment of gametophyte to substratum.
C. Reduction division to produce haploid spores.
D. Formation of sporophyte.
E. Release of antherozoids into water.
Choose the correct answer from the option given below:Sequence is B -> E -> A -> D -> C.
In bryophytes, the gametophyte attaches to substratum via rhizoids (B); flagellated antherozoids are released into water (E); antherozoids fuse with egg in archegonium (A); zygote produces multicellular sporophyte (D); spore mother cells in sporophyte capsule undergo reduction division to produce spores (C).
Gymnosperms Characteristics
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Which one of the following is the characteristic feature of gymnosperms?
Gymnosperms possess naked ovules/seeds not enclosed by an ovary wall or fruit.
Gymnosperms (gymnos = naked, sperma = seed) are seed-bearing tracheophytes whose ovules are exposed freely on megasporophylls before and after fertilization, without an enclosing ovary or fruit.
Bryophytes - Liverworts (Gemmae)
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In bryophytes, the gemmae help in which one of the following?
Gemmae are multicellular asexual reproductive propagules in liverworts (e.g. Marchantia).
Asexual reproduction in liverworts takes place by fragmentation or through specialized asexual buds called gemmae produced in gemma cups on the dorsal thallus surface.
Classification of Plant Kingdom
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Match List-I with List-II.
Pick the matching item from Column II for each row.
Column I
- A. Pteridophyte
- B. Bryophyte
- C. Angiosperm
- D. Gymnosperm
Column II
- I. Salvia
- II. Ginkgo
- III. Polytrichum
- IV. Salvinia
Correct answer: A → IV, B → III, C → I, D → II
A-IV, B-III, C-I, D-II.
Salvinia is an aquatic fern/pteridophyte (IV). Polytrichum is a moss/bryophyte (III). Salvia is an angiosperm (I). Ginkgo biloba is a living gymnosperm (II).
That is every question in Plant Kingdom for this filter.
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