(BIOL-1407) Exercise 17 - Vascular Plants w/o Seeds
The 4 phylums that make up vascular plants without seeds are...
1) Sphenophyta (Equisetum - horsetails) 2) Lycophyta (Lycopodium - club mosses) 3) Psilophyta (Psilotum - whisk ferns) 4) Pterophyta (ferns)
What does the archegonium and antheridium produce?
Archegonium produces eggs while antheridium produces sperm.
What are the advances of ferns over bryophytes?
Ferns possess vascular tissue, and true roots, stem, and leaves.
Why don't the archegonia and antheridia mature at the same time on a prothallus?
It'll promote cross-fertilization.
What is the function of the annulus?
Serves in spore disposal.
With what cell does the gametophyte generation begin? Is it haploid or diploid? Within which fern structure is it formed?
The gametophyte generation begin in haploid spores formed within the sporangium.
With what cell does the sporophyte generation begin? Is it haploid or diploid? Within which fern structure is it formed?
The sporophyte generation begin in diploid zygotes formed within the archegonium.
What happens to the gametophyte as the sporophyte mature?
Turns into roots.
Prothallus
mature gametophyte of a fern
What is a rhizome?
underground stem branches
