Seed Plants

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Seed Plants
2010-03-01 16:57:35

Dr.Haggerty, BI112 worksheet
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  1. What are the five main characteristics of seeds and seed plants?
    • 1 produce pollen grains
    • 2 all seeds have stored food for the embryo
    • 3 all seeds have seed coat
    • 4 alternation generations
    • 5 heterosporus
  2. What is heterosporus?
    produces two types of spores
  3. What are examples of conifers?
    Pine, spruce, fir
  4. Parts of the male reproductive structures.
    Cone, Pollen, Microsporophyll, Microsporoangium(pollen sacs)
  5. How many microsporangia are in one microsporophyll?
    2 microsporoangia per microsporophyll
  6. How many cells make up the pollen grain?
    • 1 generative cell
    • 1 tube cell
    • 2 prothallial cells
  7. How many ovules are there per ovuliferous scale?
    2 ovules
  8. Female parts of a conifer.
    sterile bract, ovuliferous scale, ovule, integument, microphyle, megasporangium, archegonia, egg cell, egg cell nucleus, female gametophyte, integument
  9. In pines, what does the megasporocyte develop into?
    four haploid megaspores; one survives, the other three die
  10. What does the surviving megaspore develope into?
    the female gametophyte
  11. The growing embryo gets its nutrients from what energy source?
    the female gametophyte
  12. From what structure does the seed develop?
    the ovule
  13. How old is the cone that contains the mature seed?
    2 year old cone contains the mature seed
  14. Parts of a young pine seedling.
    hypocotyl-root axis, cotyledons, leaves
  15. From what part of the seed did the seedling develope?
    the embryo
  16. Are Cycads dioecious or monoecious?
  17. Are pines monoecious or diecious?
  18. What is the shape of a Ginkgo tree leaf?
  19. Why are female ginkgos not usually used as ornamentals?
    they stink