Class notes
Bio 102 Evolution Notes
- Course
- BIO 102
- Institution
- University Of Rhode Island
This is a comprehensive and detailed note on evolution for Bio 102. Enjoy!!
[Show more]
Seller
Follow
Content preview
NATURAL SELECTION● Evolution by natural selection
○ Formed by Wallace and Darwin
○ Individuals with favorable inherited traits are more likely to survive & reproduce
● Theory explains:
○ Unity of life
○ Diversity of lids
○ Match between organism and their environment
● Darwin and Wallace evolution by natural selection
○ Proposed species change through time
○ No linear, progressive pattern
○ Based on variation within population
○ Individuals with traits produce more offspring than those without
○ Darwin's view: history of life = like a tree with branches
● Evolution as descent with modification:
○ Change over time produced modern, modified species
4 postulates
1. Variation exists among individuals that make up populations
2. Some trait differences are heritable (DNA)
3. Survival and reproduction success is highly variable
4. Subset of individuals that survive best will produce most offspring
a. Traits that will give them an advantage
● Evolution by natural selection occurs when:
○ Heritable variation leads to differential reproductive success
● How natural selection differs from previous views
○ Lamarckian evolution is progressive
○ Producing larger more complex “better” species over time
○ Organisms evolve by moving up
● Lamarck and idea of evolution through time
○ Suggested species evolve through use and disuse of body parts
○ Inheritance of acquired characters
○ Individuals develop phenotype changes in response to environmental challenges
○ Phenotypic changes are passed to offspring
○ Ex: giraffes develop long necks from stretching to reach food and produce offspring w
long necks (not true)
● Lamarck → inheritance of acquired characters (individuals)
● Darwin → descent with modification (populations)
Species: Distinct, identifiable group of populations whose members can be interbreed
● Adaptation
○ Heritable trait that increases fitness of individuals in particular environment
● Biological fitness
○ Ability of individuals to produce surviving, fertile offspring
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 anyiamgeorge19. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
75619 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now