Chapter 3: Plant Kingdom MCQs

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Questions and Answers

What is the dominant phase in the life cycle of a bryophyte?

  • Sporophyte
  • Seedling
  • Gametophyte (correct)
  • Prothallus

Which process is involved in the sexual reproduction of angiosperms?

  • Budding
  • Simple fertilization
  • Double fertilization and triple fusion (correct)
  • Asexual reproduction only

What describes the nature of lichen as a symbiotic relationship?

  • Both components are entirely independent
  • Only the fungal component benefits
  • Only the algal component benefits
  • Both components benefit and cannot survive independently (correct)

What part of the lifecycle do heterosporous pteridophytes demonstrate that is a precursor to seed formation?

<p>Formation of male and female gametes (C)</p> Signup and view all the answers

Which characteristic would you investigate in a plant that has mycorrhizal and corolloid roots?

<p>Association with fungal partners (D)</p> Signup and view all the answers

Which life cycle is characterized by having haploid stages being dominant?

<p>Haplontic life cycle (D)</p> Signup and view all the answers

Which of the following groups of algae utilizes mannitol as its reserve food material?

<p>Phaeophyceae (A)</p> Signup and view all the answers

What type of plant is a giant Redwood tree (Sequoia sempervirens)?

<p>Gymnosperm (B)</p> Signup and view all the answers

Which term describes the formation of two different types of spores in certain plants?

<p>Heterospory (C)</p> Signup and view all the answers

In Bryophytes, what are the male and female sex organs called?

<p>Antheridia and Archegonia (A)</p> Signup and view all the answers

How do higher plants differ in organization compared to lower plants?

<p>Higher plants have a more complex root system (D)</p> Signup and view all the answers

Which type of spores does Selaginella produce?

<p>Both microspores and megaspores (B)</p> Signup and view all the answers

Which of these statements about pteridophytes is false?

<p>They reproduce exclusively through seeds. (B)</p> Signup and view all the answers

What is the equivalent of roots in less developed plants?

<p>Rhizoids (A)</p> Signup and view all the answers

Which statement explains the significance of Cycas in plant evolutionary history?

<p>It is considered a 'relic of the past' due to its ancient lineage. (B)</p> Signup and view all the answers

Cyanobacteria are classified under which of the following groups?

<p>Monera (C)</p> Signup and view all the answers

The fusion of two motile gametes which are dissimilar in size is called what?

<p>Anisogamy (A)</p> Signup and view all the answers

Which structure constitutes the plant body consisting of holdfast, stipe, and frond?

<p>Phaeophyceae (D)</p> Signup and view all the answers

A plant with thallus organization, haploid rhizoids, and motile male gametes belongs to which group?

<p>Bryophytes (D)</p> Signup and view all the answers

What is a Prothallus in the context of plant development?

<p>A gametophyte free living structure in pteridophytes (A)</p> Signup and view all the answers

Which statement is true regarding the embryo sac of an Angiosperm?

<p>It consists of 7 cells and 8 nuclei (B)</p> Signup and view all the answers

If the diploid number of a flowering plant is 36, what will be the chromosome number in its endosperm?

<p>54 (A)</p> Signup and view all the answers

Flashcards

Cyanobacteria classification

Cyanobacteria belong to the Monera kingdom.

Anisogamy definition

Fusion of dissimilar sized gametes.

Plant body structure in Phaeophyceae

Holdfast, stipe, and frond make up the plant body in Phaeophyceae.

Prothallus description

A free-living gametophyte structure in pteridophytes.

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Gymnosperm characteristics

Diploid plants adapted to harsh conditions, bearing sporophylls in cones.

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Angiosperm embryo sac structure

The embryo sac is composed of 7 cells and 8 nuclei.

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Endosperm chromosome number (36 diploid)

The endosperm would have 54 chromosomes (36 x 1.5).

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Haplo-diplontic life cycle

A life cycle with both haploid (N) and diploid (2N) multicellular stages, alternating.

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Bryophyte gametophyte dominance

The gametophyte (haploid) generation is the dominant, or more prominent, phase in the life cycle of a bryophyte.

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Lichen symbiosis

A symbiotic relationship between algae and fungi, where both benefit.

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Double fertilization in angiosperms

Two sperm cells in angiosperms fertilize different parts of the female gametophyte (ovule).

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Mycorrhizae and corolloid roots

Mycorrhizae are symbiotic associations between fungi and plant roots. Corolloiod roots are a type of mycorrhizal association observed in certain plants.

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Haplontic life cycle in algae

The dominant phase in the life cycle is the haploid (single set of chromosomes) stage.

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Diplontic life cycle in plant

The dominant phase in the life cycle is the diploid (double set of chromosomes) stage.

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Floridean starch

Reserve food material of Rhodophyceae (red algae).

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Mannitol

Reserve food material in some algae.

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Bryophytes

A group of land plants without vascular tissue (xylem and phloem).

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Pteridophytes

Vascular plants that reproduce via spores, not seeds.

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Gymnosperms

Vascular plants that produce seeds without a fruit.

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Angiosperms

Flowering plants.

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Heterospory

A characteristic feature of certain plant life cycles, having two different types of spores (microspores and megaspores).

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Study Notes

Chapter 3: Plant Kingdom - Multiple Choice Questions

  • Cyanobacteria are classified under Monera.
  • Fusion of two motile gametes, which is dissimilar in size, is termed as Anisogamy.
  • Holdfast, stipe and frond constitutes the plant body in case of Rhodophytes.
  • A plant shows thallus level of organization. It needs water to complete its life cycle because the male gametes are motile. This plant belongs to Bryophytes.
  • A Prothallus is a sporophytic free-living structure in pteridophytes.

Additional Questions and Answers

  • If the diploid number of a flowering plant is 36, the chromosome number in its endosperm is 54.
  • A protonema is a haploid structure found in mosses.
  • The giant Redwood tree (Sequoia sempervirens) is a gymnosperm.
  • Food is stored as Floridean starch in Rhodophyceae. Mannitol is the reserve food material of algae.

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