Characteristics of Seed Plants and Gymnosperms

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Questions and Answers

What is the location of female cones on a gymnosperm tree?

  • On the upper branches (correct)
  • On the roots
  • On the trunk
  • On the lower branches

What is the function of the integument in a gymnosperm ovule?

  • It surrounds the nucellus (correct)
  • It protects the seed from predators
  • It facilitates fertilization
  • It produces pollen

How many megaspores are produced by meiosis in a gymnosperm megasporangium?

  • Eight
  • One (correct)
  • Four
  • Two

What is the fate of three of the four cells produced by meiosis in a gymnosperm megasporangium?

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

What is the purpose of the micropyle in a gymnosperm ovule?

<p>It allows pollen to enter (A)</p> Signup and view all the answers

How long does it take for a megagametophyte to develop in a gymnosperm?

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

What is the number of archegonia typically found at the micropylar end of the megagametophyte?

<p>2-6 (B)</p> Signup and view all the answers

What is the function of the sticky fluid in the micropyle?

<p>To allow pollen into the ovule (B)</p> Signup and view all the answers

What is the time span between pollination and fertilization in gymnosperms?

<p>About 15 months (C)</p> Signup and view all the answers

What is the equivalent of the stigma in flowering plants in gymnosperms?

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

What is the fate of the extra sperm nucleus during fertilization in gymnosperms?

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

What is the function of the microsporangia in the male cones of gymnosperms?

<p>To produce the microspores (C)</p> Signup and view all the answers

What is the characteristic of the male sex cells in seed plants?

<p>They are transported to the female sex cells by wind or animals (B)</p> Signup and view all the answers

What is the difference between gymnosperm and angiosperm seeds in terms of fertilization?

<p>Gymnosperm seeds are produced from single fertilization, while angiosperm seeds are produced from double fertilization (C)</p> Signup and view all the answers

What is the term for the fertilized ovule?

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

What is the significance of the growth of the embryo within a megasporangium?

<p>It allows the embryo to exist in a state of dormancy for various durations (A)</p> Signup and view all the answers

What is the role of the two sperm nuclei produced during meiosis?

<p>They are involved in double fertilization (B)</p> Signup and view all the answers

What is the function of the integuments in ovule development?

<p>They cover the megasporangium (C)</p> Signup and view all the answers

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