Class Notes (835,324)
Canada (509,101)
York University (35,229)
Biology (2,238)
BIOL 1500 (75)
Lecture

BioL1500 Lecture November 4. docx

2 Pages
38 Views
Unlock Document

Department
Biology
Course
BIOL 1500
Professor
Tanya Da Sylva
Semester
Fall

Description
Bio Lecture November 4 Evolution  Darwin travelled in ship  He made observations  Began to notice on Galapagos islands  Massive upheaval in biology that  Fossil discoveries  There are organisms that once existed that don’t exist anymore  Earth changed overtime.  Also plants and animals changed overtime  Darwin observations o 1 All species have such great potential fertility o 2 Populations tend to remain stable in size  Their sizes don’t fluctuate. The resources they have to use to eat. o 3 Environmental resources are limited o 4 individuals of a population vary extensively in their characteristics o 5 much of this variation is heritable  Flora and Fauna  No 2 animals are the same or identical.  From these observations he made inferences  In 1859 he published the origin of species o Descent with modification, evolution  Natural selection o Observations  Heritable variations in individuals  Overproduction of offspring o inferences  Individuals well suited to the environment tend to leave more offspring  Over time favourable traits accumulate in the population  Can individuals evolve? o No, you cant change their genetic material. Their genotype. o But populations can change overtime. How many of different alleles are around o Thus individuals don’t evolve, populations evolve.
More Less

Related notes for BIOL 1500

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