Gymnosperms
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Questions and Answers

Which structures are borne on different trees in cycas?

  • Male cones (correct)
  • Nucellus
  • Female cones
  • Megasporophylls
  • What is the composite structure called that protects the nucellus in gymnosperms?

  • Ovule (correct)
  • Male cone
  • Female cone
  • Pollen grain
  • Where are the ovules borne in gymnosperms?

  • Nucellus
  • Male cones
  • Megasporophylls (correct)
  • Female cones
  • How many megaspores are formed when the megaspore mother cell divides meiotically?

    <p>Four</p> Signup and view all the answers

    Where is the multicellular female gametophyte retained in gymnosperms?

    <p>Megasporangium</p> Signup and view all the answers

    Do the male and female gametophytes in gymnosperms have an independent free-living existence?

    <p>No, they do not have an independent free-living existence</p> Signup and view all the answers

    What is released from the microsporangium in gymnosperms?

    <p>Pollen grain</p> Signup and view all the answers

    How are the pollen grains carried to the opening of the ovules in gymnosperms?

    <p>By wind</p> Signup and view all the answers

    Where does the pollen tube carrying the male gametes grow towards in gymnosperms?

    <p>Archegonia</p> Signup and view all the answers

    What do the ovules develop into after fertilization in gymnosperms?

    <p>Seeds</p> Signup and view all the answers

    Which term best describes gymnosperms?

    <p>Plants with naked seeds</p> Signup and view all the answers

    What is the tallest tree species among gymnosperms?

    <p>Sequoia</p> Signup and view all the answers

    What type of roots are associated with N2-fixing cyanobacteria in some gymnosperms?

    <p>Coralloid roots</p> Signup and view all the answers

    What type of leaves do gymnosperms have?

    <p>Needle-like leaves</p> Signup and view all the answers

    What are the two kinds of spores produced by gymnosperms?

    <p>Microspores and megaspores</p> Signup and view all the answers

    What is the male gametophytic generation in gymnosperms called?

    <p>Pollen grain</p> Signup and view all the answers

    What are the cones bearing megasporophylls with ovules called in gymnosperms?

    <p>Macrosporangiate cones</p> Signup and view all the answers

    What do the needle-like leaves of conifers help reduce?

    <p>Water loss</p> Signup and view all the answers

    What kind of roots are found in Cycas?

    <p>Tap roots</p> Signup and view all the answers

    What is the term for the structures that bear sporangia in gymnosperms?

    <p>Strobili</p> Signup and view all the answers

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