Quiz Tomorrow!
6. I can explain the processes of macroevolution and recognize
examples.
7. I can analyze a phylogenetic tree and explain evolutionary
relationships.
8. I can contrast Darwin and Lamarck’s ideas about changes in
organisms over time.
9. I can describe the conditions required to be considered a
species.
Darwin vs Lamarck
and Speciation
LT 8 – I can contrast Darwin and Lamarck’s ideas about
changes in organisms over time.
LT 9 – I can describe the conditions required to be
considered a species.
Darwin vs Lamarck
Darwin
Lamarck
Variation
Use and disuse
Inheritance
Transmission of acquired
characteristics
Differential survival
Increasing complexity
Extinction
No extinction
Speciation
 Speciation is the formation of a new
species
 A species is a group of organisms that
are closely related and that can
produce fertile offspring.
 Speciation can begin with the
separation of populations of the
same species.
Speciation
 Accumulated differences between populations is
called divergence and can lead to a formation of a
new species.
 Two types of Speciation
 Allopatric Speciation
 Sympatric Speciation
Allopatric Speciation
 Occurs when a species separate into two
separate groups that are isolated from each
other.
 Physical Barrier
 Also known as geographical isolation
 Impossible to breed with one another
Allopatric Speciation
Allopatric Speciation
Sympatric Speciation
 Occurs when there is not a barrier to
prevent members of a species from mating
with another.
 Close proximity
 Also known as reproductive isolation
 Something seems to develop
spontaneously
Sympatric Speciation
Exit Slip – Review
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10.
What are the processes of macroevolution?
What can a phyogenetic tree tell us?
Explain the difference between Lamarck and Darwin’s ideas?
Describe speciation.
What is allopatric speciation?
What is sympatric speciation?
Differentiate between gradualism and punctuated equilibrium.
Explain adaptive radiation. What are examples?
What are the two types of mimicry?
Describe the process of extinction. What are examples of
organisms that have gone extinct?