Bell Work
The diagram illustrates the embryonic stage of two
organisms. Which of the following can be determined by
observing the embryos shown in the diagram?
a. the organisms share a common ancestry
b. the organisms belong to the same genus
c. the organisms are native to the same
geographic areas
d. the organisms will grow into
anatomically similar adults
Tuesday, February 19, 13
Bell Work
The diagram illustrates the embryonic stage of two
organisms. Which of the following can be determined by
observing the embryos shown in the diagram?
a. the organisms share a common ancestry
b. the organisms belong to the same genus
c. the organisms are native to the same
geographic areas
d. the organisms will grow into
anatomically similar adults
Tuesday, February 19, 13
Bell Work
The diagram illustrates the embryonic stage of two
organisms. Which of the following can be determined by
observing the embryos shown in the diagram?
a. the organisms share a common ancestry
b. the organisms belong to the same genus
c. the organisms are native to the same
geographic areas
d. the organisms will grow into
anatomically similar adults
b. is wrong because we can not know if they have the
same genus, since the genus of each embryo can not be
determined without studying their taxonomy
Tuesday, February 19, 13
Bell Work
The diagram illustrates the embryonic stage of two
organisms. Which of the following can be determined by
observing the embryos shown in the diagram?
a. the organisms share a common ancestry
b. the organisms belong to the same genus
c. the organisms are native to the same
geographic areas
d. the organisms will grow into
anatomically similar adults
Tuesday, February 19, 13
Bell Work
The diagram illustrates the embryonic stage of two
organisms. Which of the following can be determined by
observing the embryos shown in the diagram?
a. the organisms share a common ancestry
b. the organisms belong to the same genus
c. the organisms are native to the same
geographic areas
d. the organisms will grow into
anatomically similar adults
c. is wrong because we can not know if they are from the
same geographic area, since this could only be determined
by studying them in the wild
Tuesday, February 19, 13
Bell Work
The diagram illustrates the embryonic stage of two
organisms. Which of the following can be determined by
observing the embryos shown in the diagram?
a. the organisms share a common ancestry
b. the organisms belong to the same genus
c. the organisms are native to the same
geographic areas
d. the organisms will grow into
anatomically similar adults
Tuesday, February 19, 13
Bell Work
The diagram illustrates the embryonic stage of two
organisms. Which of the following can be determined by
observing the embryos shown in the diagram?
a. the organisms share a common ancestry
b. the organisms belong to the same genus
c. the organisms are native to the same
geographic areas
d. the organisms will grow into
anatomically similar adults
d. is wrong because we can not know if they will grow into
similar adults, since this could only be determined by
allowing them to grow and then comparing the adults
Tuesday, February 19, 13
Bell Work
The diagram illustrates the embryonic stage of two
organisms. Which of the following can be determined by
observing the embryos shown in the diagram?
a. the organisms share a common ancestry
b. the organisms belong to the same genus
c. the organisms are native to the same
geographic areas
d. the organisms will grow into
anatomically similar adults
Tuesday, February 19, 13
Bell Work
The diagram illustrates the embryonic stage of two
organisms. Which of the following can be determined by
observing the embryos shown in the diagram?
a. the organisms share a common ancestry
b. the organisms belong to the same genus
c. the organisms are native to the same
geographic areas
d. the organisms will grow into
anatomically similar adults
a. is right because similar looking embryos is evidence for
common ancestry and evolution
Tuesday, February 19, 13
Vocabulary Review
Tuesday, February 19, 13
Vocabulary Review
• population:
Tuesday, February 19, 13
Vocabulary Review
• population:: group of organisms of the same species
Tuesday, February 19, 13
Vocabulary Review
• population:: group of organisms of the same species
• members of a species can reproduce and produce
fertile offspring together
Tuesday, February 19, 13
Vocabulary Review
• population:: group of organisms of the same species
• members of a species can reproduce and produce
fertile offspring together
• community:
Tuesday, February 19, 13
Vocabulary Review
• population:: group of organisms of the same species
• members of a species can reproduce and produce
fertile offspring together
• community:: group of interacting populations
Tuesday, February 19, 13
Natural Selection
Tuesday, February 19, 13
Natural Selection
the way in which populations evolve over time as
organisms best suited for their environment
reproduce and pass on their genes more frequently
Tuesday, February 19, 13
Natural Selection
Tuesday, February 19, 13
Natural Selection
Tuesday, February 19, 13
Natural Selection
1. species have genetic variation
Tuesday, February 19, 13
Natural Selection
1. species have genetic variation
2. organisms compete over
resources
Tuesday, February 19, 13
Natural Selection
1. species have genetic variation
2. organisms compete over
resources
3. the environment presents
many challenges
Tuesday, February 19, 13
Natural Selection
1. species have genetic variation
2. organisms compete over
resources
3. the environment presents
many challenges
4. best suited organisms survive
and produce more offspring
Tuesday, February 19, 13
Natural Selection
1. species have genetic variation
2. organisms compete over
resources
3. the environment presents
many challenges
4. best suited organisms survive
and produce more offspring
Tuesday, February 19, 13
I will have more
kids, because I will live
the longest.
Natural Selection
1. species have genetic variation
2. organisms compete over
resources
3. the environment presents
many challenges
4. best suited organisms survive
and produce more offspring
5. over time, the traits of those
best suited become more
frequent
Tuesday, February 19, 13
Natural Selection
1. species have genetic variation
2. organisms compete over
resources
3. the environment presents
many challenges
4. best suited organisms survive
and produce more offspring
5. over time, the traits of those
best suited become more
frequent
Tuesday, February 19, 13
Speciation
Tuesday, February 19, 13
Speciation
process by which a new species if formed
Tuesday, February 19, 13
Speciation
process by which a new species if formed
• some organisms are better at survival
Tuesday, February 19, 13
Speciation
process by which a new species if formed
• some organisms are better at survival
• they produce more offspring
Tuesday, February 19, 13
Speciation
process by which a new species if formed
• some organisms are better at survival
• they produce more offspring
• the population begins to change
Tuesday, February 19, 13
Speciation
process by which a new species if formed
• some organisms are better at survival
• they produce more offspring
• the population begins to change
• if it changes enough, a new species forms
Tuesday, February 19, 13
Speciation
process by which a new species if formed
• some organisms are better at survival
• they produce more offspring
• the population begins to change
• if it changes enough, a new species forms
• when they can no longer breed with the original
Tuesday, February 19, 13
Speciation
Tuesday, February 19, 13
Speciation
Tuesday, February 19, 13
Speciation
• speciation is caused by isolation
Tuesday, February 19, 13
Speciation
• speciation is caused by isolation
• geographic:
Tuesday, February 19, 13
Speciation
• speciation is caused by isolation
• geographic:: separated by space
Tuesday, February 19, 13
Speciation
• speciation is caused by isolation
• geographic:: separated by space
• organisms living in different areas will evolve
differently
Tuesday, February 19, 13
Speciation
Tuesday, February 19, 13
Speciation
• speciation is caused by isolation
• geographic: separated by space
• organisms living in different areas will evolve
differently
Tuesday, February 19, 13
Speciation
• speciation is caused by isolation
• geographic: separated by space
• organisms living in different areas will evolve
differently
• temporal:
Tuesday, February 19, 13
Speciation
• speciation is caused by isolation
• geographic: separated by space
• organisms living in different areas will evolve
differently
• temporal:: separated by time
Tuesday, February 19, 13
Speciation
• speciation is caused by isolation
• geographic: separated by space
• organisms living in different areas will evolve
differently
• temporal:: separated by time
• organisms that reproduce
at different times will not
be able to breed, over time
they will evolve
Tuesday, February 19, 13
Speciation
• speciation is caused by isolation
• geographic: separated by space
• organisms living in different areas will evolve
differently
• temporal:: separated by time
• organisms that reproduce
lion 14.2, conlinued
oduction lo llalural Selection
etimes populations
will not interbreed
because of
temporal
roductive) isolation, which occurs when a species develops different
oductive cycles (like a spring cycle or a fall cycle). Members of the
ng cycle will not interbreed with members of the fall cycle. Eventually
wo groups may become so different that they can no longer
breed, and they would be considered two distinct species.
at
different
times
will
not
graph on the right
hypothetical breeding times for two
rent populations
mice
geographic
of mice. The
live in the over
be
able
to
breed,
time
tion, but do not interbreed. Scientists determine that the two
ulations of they
mice
interbreed
when they
held in captivity
will
evolve
populations
l zoo.
example of reproductive isolation.
shows the
same
can
are
Tuesday, February 19, 13
=
o
{,,
E
6
=
at the
These
are an
r time, these two populations may become two species that are no
er able to interbreed. even in captivity.
Breeding Times in Mice Populalions
March April May June
July
Review Questions
a. a group of organisms of the
same species
___2. species
b. the way in which populations
change
___3. population
c. living factors
___4. community
d. caused by the division of a
population
due
to
a
physical
___5. biotic
barrier
___6. speciation
e. a group of populations
f. caused when a population
___7. geographic isolation
reproduces during different times
___8. temporal isolation g. a group of organisms that can
interbreed
h. creation of a new species
___1. natural selection
Tuesday, February 19, 13
Review Questions
b
___1.
natural selection
a. a group of organisms of the
same species
___2. species
b. the way in which populations
change
___3. population
c. living factors
___4. community
d. caused by the division of a
population
due
to
a
physical
___5. biotic
barrier
___6. speciation
e. a group of populations
f. caused when a population
___7. geographic isolation
reproduces during different times
___8. temporal isolation g. a group of organisms that can
interbreed
h. creation of a new species
Tuesday, February 19, 13
Review Questions
b
___1.
natural selection
a. a group of organisms of the
same species
g
___2.
species
b. the way in which populations
change
___3. population
c. living factors
___4. community
d. caused by the division of a
population
due
to
a
physical
___5. biotic
barrier
___6. speciation
e. a group of populations
f. caused when a population
___7. geographic isolation
reproduces during different times
___8. temporal isolation g. a group of organisms that can
interbreed
h. creation of a new species
Tuesday, February 19, 13
Review Questions
b
___1.
natural selection
a. a group of organisms of the
same species
g
___2.
species
b. the way in which populations
change
a
___3.
population
c. living factors
___4. community
d. caused by the division of a
population
due
to
a
physical
___5. biotic
barrier
___6. speciation
e. a group of populations
f. caused when a population
___7. geographic isolation
reproduces during different times
___8. temporal isolation g. a group of organisms that can
interbreed
h. creation of a new species
Tuesday, February 19, 13
Review Questions
b
___1.
natural selection
a. a group of organisms of the
same species
g
___2.
species
b. the way in which populations
change
a
___3.
population
c. living factors
e
___4.
community
d. caused by the division of a
population
due
to
a
physical
___5. biotic
barrier
___6. speciation
e. a group of populations
f. caused when a population
___7. geographic isolation
reproduces during different times
___8. temporal isolation g. a group of organisms that can
interbreed
h. creation of a new species
Tuesday, February 19, 13
Review Questions
b
___1.
natural selection
a. a group of organisms of the
same species
g
___2.
species
b. the way in which populations
change
a
___3.
population
c. living factors
e
___4.
community
d. caused by the division of a
population
due
to
a
physical
c
___5. biotic
barrier
___6. speciation
e. a group of populations
f. caused when a population
___7. geographic isolation
reproduces during different times
___8. temporal isolation g. a group of organisms that can
interbreed
h. creation of a new species
Tuesday, February 19, 13
Review Questions
b
___1.
natural selection
a. a group of organisms of the
same species
g
___2.
species
b. the way in which populations
change
a
___3.
population
c. living factors
e
___4.
community
d. caused by the division of a
population
due
to
a
physical
c
___5. biotic
barrier
h
___6.
speciation
e. a group of populations
f. caused when a population
___7. geographic isolation
reproduces during different times
___8. temporal isolation g. a group of organisms that can
interbreed
h. creation of a new species
Tuesday, February 19, 13
Review Questions
b
___1.
natural selection
a. a group of organisms of the
same species
g
___2.
species
b. the way in which populations
change
a
___3.
population
c. living factors
e
___4.
community
d. caused by the division of a
population
due
to
a
physical
c
___5. biotic
barrier
h
___6.
speciation
e. a group of populations
f.
caused
when
a
population
d
___7.
geographic isolation
reproduces during different times
___8. temporal isolation g. a group of organisms that can
interbreed
h. creation of a new species
Tuesday, February 19, 13
Review Questions
b
___1.
natural selection
a. a group of organisms of the
same species
g
___2.
species
b. the way in which populations
change
a
___3.
population
c. living factors
e
___4.
community
d. caused by the division of a
population
due
to
a
physical
c
___5. biotic
barrier
h
___6.
speciation
e. a group of populations
f.
caused
when
a
population
d
___7.
geographic isolation
reproduces during different times
f
___8.
temporal isolation g. a group of organisms that can
interbreed
h. creation of a new species
Tuesday, February 19, 13
Review Questions
1. In terms of the type of species in each, what is the difference
between a population and a community?
2. What is natural selection?
3. Who came up with the idea of natural selection?
4. What was he studying when he came up with this idea?
5. What book was this idea first published in?
6. Why do organisms better suited for their environment leave
behind more offspring than other organisms?
7. What is speciation?
8. What causes speciations?
9. What are the two types of speciations?
10. What is the difference between the two types?
Tuesday, February 19, 13