30 Questions | Total Attempts: 1710

Gymnosperms - Quiz

A fill in the blank quiz to prepare for a botany exam on gymnosperms.

Questions and Answers
  • 1. 
    In male gametophytes, or pollen grains, of seed plants, the cell that develops into the pollen tube.
  • 2. 
    The cell of the male gametophyte, or pollen grain, of gymnosperms, which divides mitotically to form two sperm.
  • 3. 
    A structure formed by the maturation of the ovule of seed plants following fertilization.
  • 4. 
    Gymnosperm means:
  • 5. 
    The outer layer of the seed, developed from the integuments of the ovule.
  • 6. 
    The sterile cell or cells found in the male gametophytes, or microgametophytes, of vascular plants other than angiosperms; believed to be remnants of the vegetative tissue of the male gametophyte.
  • 7. 
    Having more than one embryo within the developing seed.
  • 8. 
    In angiosperms, the transfer of pollen from an anther to a stigma. In gymnosperms, the transfer of a pollen to a pollen-producing cone directly to an ovule.
  • 9. 
    A tube formed after germination of the pollen grain; carries the male gametes into the ovule.
  • 10. 
    A microspore containing a mature or immature microgametophyte.
  • 11. 
    In certain conifers, the appendage or scalelike shoot to which the ovule is attached.
  • 12. 
    Inner part of an ovule, in which the embryo sac develops; equivalent to a megasporangium.
  • 13. 
    A cell in which meiosis will occur, resulting in four microspores.
  • 14. 
    In the ovules of seed plants, the opening in the integuments through which the pollen tube usually enters.
  • 15. 
    A diploid cell in which meiosis will occur, resulting in the production of four megaspores.
  • 16. 
    The outermost layer or layers of tissue enveloping the nucellus of an ovule; develops into the seed coat.
  • 17. 
    Unrestricted or unlimited growth, as with a vegetative apical meristem that produces an unrestricted number of lateral organs indefinitely.
  • 18. 
    In many gymnosperms, the cell of the male gametophyte that divides to form the sterile and spermatogenous cells.
  • 19. 
    Growth of limited duration, characteristic of floral meristems and of leaves.
  • 20. 
    An accessory seed covering, often formed by an outgrowth at the base of the ovule; often brightly colored, which may aid in dispersal by attracting animals that eat it and, in the process, carry the seed away from the parent plant.
  • 21. 
    Family includes in conifers that includes the evergreen trees.
  • 22. 
    "One house"
  • 23. 
    "Two houses"
  • 24. 
    Pollen grains are dispersed by
  • 25. 
    Fertilization in cones occurs within the:
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