These notes cover the second chapter of the course, including the lecture, readings, and essential discussions. Whether you missed a class, need to review for exams, or want a concise summary of complex topics, these notes are your go-to resource. They are ideal for students who want to save time ...
charles darwin and the origin of species
•his book presented two main points
1. present day species are the descendants of ancient ancestors that they
still resemble in some ways
2. over time, differences accumulated by a process called "descent with
modification" (darwin's phrase for evolution)
natural selection: process by which organisms with certain inherited traits
are more likely to survive and reproduce than are individuals with other
traits
•populations change over generations: population is a group of the same
species living in the same place at the same time
•natural selection leads to evolutionary adaptation, a population's
increase in the frequency of traits suited to the environment, ex:
camouflage
•evolution: genetic composition of a population has changed over time
fossils:
imprints or remains of organisms that lived in the past
lamrack and evolutionary adaptations:
•french naturalist lamrack suggested that the best explantion
for these observations is that life evolves
•he proposed that by using or not using its body parts, an individual
may develop certain traits that it passes on
a. lamrack suggested that strong beaks are the cumulative result of
ancestors exercising their beaks during feeding and passing that acquired
beak power on to offspring
b. a carpenter with a lifetime of pounding nails will not pass enhanced
biceps on
c. his idea that species evolve as a result of interactions between
organisms and their environments helped set the stage for darwin
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 CollegeStuviaStudent. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.99. You're not tied to anything after your purchase.
