Class Notes (836,994)
Canada (510,027)
Biology (25)
BIOL 1130 (25)
Berkley (25)
Lecture

Biology - Day 19.docx

2 Pages
51 Views
Unlock Document

Department
Biology
Course
BIOL 1130
Professor
Berkley
Semester
Fall

Description
Plant Biology Wednesday October 24, 2012 Fern and Relatives - 4 phyla – Psilotophyta, Lycophyta, Equisetophyta, Polyodiophyta - These plants were dominant in the carboniferous period (Vegetation) - 363-290 million years ago - Present in the equator when conditions were hot & moist - Life Cycle – Alternation of Generations o A) Independent life forms – Haploid & Diploid o B) Sporophyte phase – most obvious (2N) o Spores not seeds but have vascular systems  Protostelem **PICTURE** Phylum Psilotophyta (Whisk Ferns) - Tropical, warm areas  southern U.S. - 2 genera – Psioltum & Tuesiptesis Psilotum - Stem branching – dichotomous branching ** PICTURE** - No leaves  but enations - Stems – photosynthesis - No roots – rhizones (underground stems) - They have in terms of the sporocytes, will produce 1 type of spore called homospores. Life Cycle - Sporangia on upper parts of the stem - Fused in 3 - Sporangia  meiosis  Spores (N) from the 2N sporocytes - Spores germinate  form very small (feminine L v U) gametophyte - Will produce female archegonia (egg) + male antheridia (sperm) - Fertilization occurring  zygote  germinates and produce the mature whish fern sporophyte (2N) Phylum L
More Less

Related notes for BIOL 1130

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit