Post on 21-Jan-2016
transcript
MacroevolutionWorksheet review
1. Allopatric = geographically separatedRiversMountainsNew islands
Roads
Most common
Sympatric Speciation (rare in animals)
New species form in same location
Much less common
Changes in Chromosome # Error in meiosis leads to extra chromosmes
– called polyploidy Instantly new species in plants
2. Pre-Zygotic BarriersHabitatsTimingBehavior/songs/dancesAnatomicalSperm/egg incompatible
3. Problems with Model Asexual species Extinct species Situations where
population B can reproduce with both A and C, but A and C cannot reproduce with each other
Species where hybridization sometimes works
4. Only if the liger is fertile and capable of
reproducing Most likely not
5. Fossil record (see many similarities
between extinct species and modern species) Age of fossils Transitional fossils
Vestigial structures Homologous structures DNA similarities
6. C – Acropora lamarckii is in same genus
as Acropora aspera, so they are most closely related
Bursaa lamarkii is in different genus so it can’t be as closely related.
Similar species name is just because biologists aren’t very creative
7. B – Class > Order > Family > Genus >
Species
8. Keep in mind that the number of differences essentially tells us relatively how long ago the common ancestor was
8.
Tim
eLo
ng t
ime a
go
Now
Feline Ancestor
Hou
seca
t
5
2C
heeta
h
Cougar
Bob
cat
8
20
Lion
2
Jagu
ar
4
Leopard
6
Tig
er
8.
Tim
eLo
ng t
ime a
go
Now
Feline Ancestor
Hou
seca
t
5
2C
heeta
h
Cougar
Bob
cat
8
20
Lion
Jagu
ar
Leopard
6
Tig
er
24
9.
Figure out each time, what trait comes next to separate branches
9.Tim
eLo
ng t
ime a
go
Fish-Like Ancestor
-Lungs
Fish
-Amniotic Egg
Frog
-Hair
AnapsidSkull
Liza
rd
Bir
d
-Live BirthPla
typus
-Placenta
Koala
-Bipedal
Chim
panze
e
Hum
an
9.Tim
eLo
ng t
ime a
go
Fish-Like Ancestor
-Lungs
Fish
-Amniotic Egg
Frog
-Hair
AnapsidSkull
Liza
rd
Bir
d
-Live BirthPla
typus
-Placenta
Koala
-Bipedal
Chim
panze
e
Hum
an Species/
genus
Family
Ora
nguta
n
Order
Class
Phylum