Class Notes (836,581)
Canada (509,857)
Biology (2,156)
BIO153H5 (211)
Lecture 5

Lecture 5 - Protists I.pdf

2 Pages
Unlock Document

Christoph Richter

Lecture 5 - Protists Tuesday, 21 January, 2014 12:56 PM Today's Topics: Announcements: Homework:  Protists  Bio seminar in CC2150 on Assignment 1 Friday at noon Lab 2  Eukaryotes  Lyle White, McGill Read ch. 29.1-29.3 University on cryomicrobiology Lecture Topic: Example protists:  Foreminifera (foramen = window or hole, fer = carrying or bearing) ○ Produce the material used in the pyramids, white cliffs of Dover ○ Calcium carbonate, CaCO 3  Diatomsare also protists ○ Structure and forms all completelydifferent Protists form the basis of aquatic food chains in rivers, lakes, oceans  Their wellbeing as a species affects the wellbeing of species higher up in the food chain The rest of the course deals with eukaryotes:  Know the difference between bacteria, archaea, and eukarya  Eukarya name origin ○ Eu from Greek word for "well" ○ Karyon = kernel or nut ○ All have a cell nucleus - looked like a nut within a cell  Includes a commonancestor of all eukaryotes ○ Many, many protists which are a paraphyletic group  Monophyletic - the entire branch is the group and is the entire group □ Snip test - with one snip, cut off only that group and all of that group  Paraphyletic - all the descendants are in a branch but part of the branch is not part of the group □ The branch includes more taxa than it should  Polyphyletic - the descendants are spread over multiple parts of the tree □ That branch for the group does not have all the species it should have ○ Also includes fungi, animals, and land plants  All eukaryoteshave a membrane-bound nucleus ○ Currently accepted hypothesis for the evolution of the nucleus:  Ancestor with no nucleus has chromosomes  Plasma membrane folds in  Formationof nuclear envelope which encircles the chromosomes, forming
More Less

Related notes for BIO153H5

Log In


Join OneClass

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

Sign up

Join to view


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.