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Alternation of Generations: Mosses, Ferns, and Gymnosperms | |
| Cyberbiology
Links An "easy to read" page on mosses written by a couple of naturalists Some images of Cooksonia from the museum of Natural History (Washington, D.C.)
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Alternation of Generations: Mosses Sporophytes make spores by ________. (meiosis or fertilization) Gametes fust to make sporophytes by _____. (meiosis or fertilization) Label each as diploid or haploid:
What you recognize as a moss plant is a ________ (sporophyte or gametophyte) Antheridia are found on which sex moss plants? What do antheridia make? What are egg cells and sperm cells? (haploid or diploid) Out of the top of which moss plant will a sporophyte grow? (male or female) What's the process that takes you from diploid to haploid? (meiosis or mitosis)
Alternation of Generations: Ferns What's getting Dr. Wolfe excited about Cooksonia? Why do moss plants have to have water to reproduce? What's a fern plant? (sporophyte or gametophyte) What process is occurring in sori? Call Jerry Springer! He might put fern gametophytes on his show sense they are ____, meaning they grow archegonia and antheridia structures on a single gametophyte. A fern sporophyte will end up growing out of the ______ (antheridia or archegonia) or a gametophyte. See how water is still required for fern reproduction? See why ferns can't move too far from cool, shady places? Isn't learning about this stuff cool?
Alternation of Generations: Gymnosperms Which structure grew taller and more complex as the gymnosperms evolved? (gametophyte or sporophyte) Naked seeds? This means the seeds are not covered by a _______. What's homosporous? Who produces homosporous spores? What's heterosporous? What does a megaspore become? (male or female structures?) (pollen or egg?) What does a microspore becomes? (same options as above)
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