Interview
IBDP HL biology evolution
- Course
- Institution
- Book
It covers the higher level IBDP syllabus for biology topic 5 and 10.3 which is evolution. The notes are summarized.
[Show more]
Connected book
Book Title:
Author(s):
- Edition:
- ISBN:
- Edition:
More summaries for
-
IB Biology SL - the Complete Summary for the IBDP Exam
-
Oxford IB Biology Study Guide
Seller
Follow
arathi3000
Content preview
evolutionBy Arathi Anand
topic five
5. I -
evidence for evolution
5. 2- natural selection
5. 3- Classification of biodiversity
5. 4- Cladistics
, 5.1 evidence of evolution
is / 1012020
evolution cumulative change in the heritable characteristics or-
a
population
Cumulative change small many generations
° -
:
change over
0 Heritable characteristics :
gene - controlled factors
they heritable traits alleles in an
o
These traits cannot be acquired over a lifetime ,
are or
organism 's DNA .
evidence
of evolution Fossil records
0 Fossils -
sedimentary rocks °
Fossils are the preserved remains of animals , plants , and other organisms from the
past
HÉgxe
° .
☐
The fossil record shows the gradual change of species over time
°
Vestigial structure e.
g. appendix 0
The timeline in which fossils scientists would expect , with
appear are what
•
selective breeding bacteria andalgae being the in the fossil record .
Followed later by
thermals and Ibis , then dinosaurs and early reptiles birds and
o
comparative DNA ,
mammals later still .
°
Observable change
°
Relative Dating : rocks the bottom are older than the rocks near the top
at
.
( not very accurate at different rocks form / erode at dirrerent rates ) .
and throughout the yea ,
selective breeding Caniriciai selection ) Radioactive Dating rocks contain radioactive elements
°
:
elements in the end than started
these elements decay →
leaving less radioactive
.
0
breeding plants and animals for specific genetic trails
0
shows a good record of recent changes in genetic characteristics over a few dozens of generations that man has selected to breed .
°
For example ,
chickens that produce more eggs or cows that produce more milk are selected to breed , hopefully passing these traits onto the next .
generations .
based useful beneficial characteristics breeders would like to see in the next generation
°
plants can be bred in a similar manner on on
of plants .
breeds through artificial selection
☐ The evolution of domesticated dogs has produced many .
homologous structure ( similar structures found in dissimilar species )
common internal structures that are similar in seemingly dissimilar animals evolved
0
that have from a common ancestor .
•
The standard example of homologous structure is the
pentadactyl limb which is the five digit limb found in animals such as
humans , dolphins, bats
,
and dogs .
and function of this structure vary between structure and position of the bones in these
o Even
though the shape ,
size
species , the general
limbs are the same .
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 arathi3000. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $8.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
64438 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now