Plant Reproduction and Development: Gemmae and Spores
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Questions and Answers

How are spores produced in bryophytes?

  • By fusion of gametophytes
  • By meiosis of sporophyte cells (correct)
  • By fragmentation of thalli
  • By mitosis of sporophyte cells

Why are mosses and lichens considered to be the first organisms to colonize rocks?

  • They decompose rocks making the substrate suitable for plant growth (correct)
  • Because they have a symbiotic relationship with rocks
  • Due to their ability to conduct photosynthesis
  • Their capacity to hold water makes them suitable for rock colonization

What is the main function of the sporophyte in bryophytes?

  • Producing gametophytes
  • Secreting protective compounds
  • Conducting photosynthesis
  • Attaching to the photosynthetic gametophyte (correct)

Which bryophyte species provides peat, historically used as fuel?

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

How do liverworts reproduce asexually?

<p>By forming gemmae (D)</p> Signup and view all the answers

What distinguishes the plant body of a liverwort like Marchantia?

<p>'Thalloid' body with dorsiventral thallus closely appressed to the substrate (C)</p> Signup and view all the answers

Why do liverworts grow in moist, shady habitats?

<p>To reduce water loss through evaporation (A)</p> Signup and view all the answers

'Sphagnum' species are particularly known for their:

<p>'Water-holding' capacity (A)</p> Signup and view all the answers

What is the ecological importance of mosses on soil?

<p>Absorbing excess rainwater and preventing erosion (C)</p> Signup and view all the answers

Why are bryophytes classified into liverworts and mosses?

<p>Based on their reproductive strategies. (D)</p> Signup and view all the answers

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