Exam (elaborations)
BIO 121 Exam 1 Review Spring 2024 | Questions with Complete Answers.
- Course
- Institution
BIO 121 Exam 1 Review Spring 2024 | Questions with Complete Answers.
[Show more]
Content preview
BIO 121 Exam 1 ReviewSpring 2024
Evolution
Answer The gradual change in a species over time.
Adaptation
Answer When the heritable trait increases an individuals fitness
in a particular environment.
Ancestral trait
Answer Is a character that existed in an ancestor.
Derived trait
Answer Is one that is a modified form of the ancestral trait,
found in a descendants.
Vestigial trait
, Answer A reduced or incompletely developed structure that has
no (or reduced) function (e.g. human tailbone or wisdom teeth).
Homologous structures
Answer Are similarities that exist in species descended from a
common ancestor (e.g. humans, dogs, and birds have similar
limb structure).
Convergent evolution
Answer Occurs when similar environmental pressures and
natural selection give rise to similar (analogous) structures in
distantly related organisms.
Dispersal
Answer The movement of organisms or individuals from one
place to another can result in Allopatric Speciation (e.g. birds
flying to a new island).
Vicariance
Answer The physical splitting of a habitat, some type of
geographic barrier can result in Allopatric Speciation. (e.g.
rivers or mountains splitting populations).
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 igniteminds. 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)
67096 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now