Exam (elaborations)
ENVS 212 - Exam 2 Questions with Correct Answers
- Course
- Institution
ENVS 212 - Exam 2 Questions with Correct Answers
[Show more]
Content preview
ENVS 212 - Exam 2 Questions with Correct AnswersWhat is a cline? Correct Answer-a smooth transition in a trait across geographical space
What is an example of cline? Correct Answer-a species having greater cold tolerance in the colder parts of its range than in the warmer parts of its range
What is Bergmann's Rule? Correct Answer-Body sizes of mammals and birds increase with distance FROM the equator
What is Bergmann's Rule and example of? Correct Answer-A cline!
When do clines evolve? (2) Correct Answer-- When selection pressures change across space
- When there is gene flow between populations
What is Gene Flow? Correct Answer-The mixing of alleles between different populations
What are the 2 important roles of gene flow in evolution? Correct Answer-- Equalizes allele frequencies and erodes genetic differences between populations
- Introduces new alleles into populations where they already exist What causes gene flow? Correct Answer-Dispersal of either gametes or individuals
True or false: Not all migration results in gene flow Correct Answer-
True
What equation "measures migration"? Correct Answer-∆p = m (pm - p)
Define the variables in the equation:
∆p = m (pm - p) Correct Answer-- ∆p is the change in allele frequency due to migration
- m is how quickly gene flow eliminates genetic differences between populations
- pm is allele frequency in migrants
- p is allele frequency in recipient population
When can we and can we not use the equation ∆p = m (pm - p)? Correct Answer-When there are no distinct populations due to spatial continuity
What is this formula measuring?
∆p = m (pm - p) Correct Answer-Migration rate
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller cracker. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $14.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
81531 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now