Transcript More on Macroevolution - Jones College Prep High School

1.
Critique the following statement “evolutionists
argue that the incredible complexity of life has
come about randomly”
2.
Why do you think females usually select traits in
males and not the other way around?
3.
Based on the causes of microevolution, do you
think its possible for a population to NOT be
microevolving?
Big Changes
Is concerned
without how new
taxonomic
groups came to
be
 I.e. how did
mammals evolve
from ancestral
reptiles

 Trace
evolutionary
history
 Like a family
tree
Domain
Kingdom
 Phylum
 Class
 Order
 Family
 Genus
 Species


Domain
Kingdom
 Phylum
 Class
 Order
 Family
 Genus
 Species


Eukarya
Animalia
 Chordata
 Mammalia
 Primate
 Hominidae
 Homo
 Sapiens


 Dude
 Kings
▪ Play
▪Chess
 On
Fancy
Gold
Sets
Usually a population gets separated
Different populations encounter different
environments and accumulate different traits
 When they are so different they can’t
reproduce- they are considered a new species


 Cannot
naturally
reproduce with
each other
 Is a byproduct
of changing
DNA
Live in different
habitats
 Mate at different
times
 Different mating
behaviors
 Different
equipment
 Sperm and egg
don’t fuse



The offspring fail to
survive
The offspring are
sterile
 i.e. mules

So in the long run
the genes of the two
populations don’t
mix






We look for anatomical
similarities
Similarities in the
amino acids in their
proteins
Similarities in DNA
sequence
Similarities in behavior
Similarities in
development
Similarities to fossil
record


There are a LOT of species
Phylogenetic trees get really, really
complicated and extremely detailed
The top means modern-day species
 As you go lower you have the
ancestors of that species
 Branching means the populations
split into two different groups
 The more recently the groups
branched, the more closely related
 The higher on the tree you group
things, the more specific the group

Felis
 Divergent evolution
 Adaptive Radiation
 Co-evolution
 Convergent evolution
Two populations
evolve to look very
different, despite
being related
 i.e. whales and
hippos are closely
related- but look
very different
 Have homologous
structures

 When many
species evolve
from a single
ancestor
 I.e. all primates,
all mammals
etc.
 Evolution of
one species
affects the
other
 i.e. birds and
flowers,
predators and
prey
2 different species
evolve to become
more similar
 i.e. birds and bats,
dolphins and fish
etc.
 Leads to
analogous
characteristics

Each group will cover a major branch on
the Tree of Life
 Identify the unique features of that
group, anything important or interesting
about them, and examples of members.
 Present them to the class
 You will be quizzed on the main points
on all of the groups
