Class Notes (834,986)
Canada (508,846)
Biology (6,794)
Biology 1001A (1,727)
Dr.Mike (47)
Lecture

Lecture 22.docx

2 Pages
62 Views
Unlock Document

Department
Biology
Course
Biology 1001A
Professor
Dr.Mike
Semester
Fall

Description
Lecture 22 Arms Race  Evolutionary innovations can induce adaptive radiation  o angiosperms use animals as pollinators o different pollinators -> reproductive isolation  What's in it for the bird?  o nectar, food  When two species interact...  o Both may benefit: Mutualism o Both may suffer: Competition o One may benefit at the expense of the other: anatgonism  Evolutionary arms race  o adaptation by species A improves its ability to interact with species B o selection pressure on B to evolve counter-adaptation o selection pressure on A to evolve counter-counter-adaptation  Improved equipment =/= improved success  Who wins the arms race?  o may keep escalating until costs outweigh benefits o  Red Queen equilibrium o sometimes, one side has the advantage o  generation time  population size  strength of selection  Life-dinner principle  o prey need to run for their lives, if got caught, they're dead o predator just don't get to eat, if does not catch a prey  Arms races between mutualists  Back to antagonism... Host-parasite relationships  o Parasite gets resources at the expens
More Less

Related notes for Biology 1001A

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