Class Notes (837,609)
Canada (510,370)
Biology (2,156)
BIO211H5 (55)

BIO211 WEEK 12 (2).docx

3 Pages
Unlock Document

Michaelde Braga

BIO211 WEEK 12 (2) Chpts 18 19 20 THE CENOZOIC CLIMATE CHANGE  Evidence for horrenderous elephants cpt 16 or 17  Origin of humans ON TEST ( rationale behind why humans came out of forest and how climate change influenced that  Pliocene – Pleistocene glaciation continued- it grew then receded then grew then receded  10 thousand years ago the glacier started to recede significantly and the continents’ we see now started to form  The northern hemisphere is what changed the most from Pleistocene to todays time  The southern hemisphere didn’t change dramatically- it is keeping us in a glacial situation even to today o We are still in an ice age period and its Antarctica that is keeping us there o It is a larger continental mass then north America, Africa and Asia o And it has a lot of ice sitting on top of it o Whatever happens to the ice will impact the entire surface of the earth  Holocene is the name given to the age after the ice age  Humans arrived over 20 thousand years ago and if so it is unlikely that they are accountable for the extinction of the animals  Was it glaciation? End of glaciation? Or the emergence of humans that caused the extinction of these animals? o The evidence presents that it is least likely that humans were responsible for this  As glaciers receded more land is exposed and this land was open soil devoid of forests  Decomposition releases methane and when soil opened plant material started to decompose  The ice shelf grows in the winter and melts in the summer  Satellites show that the growth is less then what it use to be 10 years ago and it is melting more then it use to 10 years ago     Humans evolved out of Africa o They evolved as tree dwellers o As glaciation increases- cool weather coincides with dryer weather- as that happens trees dry out o And as this happens the humans living in there were forced to adopt to t a different environment that was less tree like o This is the process that forced humans to survive outside of trees and into a bigger environment o Leaving trees also taught us how to stand straight which helped us to see when and where our predators were coming from and we could protect ourselves  The cooling of the climate, elimination of trees and forcing lineage of humans into the savannahs accelerated the change  Large animals
More Less

Related notes for BIO211H5

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.