EEB340H1 Lecture 13: EEB340 Lecture 13.docx
Which is NOT a characteristic of Psilotum (whickfern)?
three-lobed sporangium (synangium)
meiosis within a sporangium produces gametes
gametophyte develops from spores
the invasion of symbiotic fungus into the gametophyte isessential for its development
5. Use fern life cycle to answer the following questions.
a) Are the spores produced by the sporophyte formed by meiosis or mitosis?
b) Do the spores belong to the gametophyte or the sporophyte generation?
c) Are the gametes produced by mitosis or meiosis?
d) Is the dominant generation for bryophytes the gametophyte or the sporophyte?
e) Is the dominant generation for ferns the gametophyte or the sporophyte?
f) Can you suggest any ecological role for ferns?
4) Use the fungal life cycle to answer the questions.
a) Define plasmogamy and karyogamy.
b) Name one difference between asexual spores and sexual spores.
c) How did zygomycota (zygote fungi) get its name? What is the name of the structure that makes this group of fungi distinct?
1.The gametophyte tissue forms a slender stalk that lifts the sporophyte above the thick tuft of stems in which it was originally enclosed. Why is this an advantage in the reproductive cycle?
2.How is the mechanism for spore dispersal in ferns similar to that of bryophytes?
3.Is the prothallium haploid or diploid?
4.Is the prothallium sporophyte or gametophyte?
Complete the table
Sporophyte or Gametophyte