Transcript SBI3U WARM UP 1. Natural Selection is best described as:

SBI3U
WARM
UP
PROOFS of
EVOLUTION
SBI3U WARM UP
1. Natural Selection is best described as:
A) Individuals who are less adapted to their environment
survive and pass these traits onto the next generation
B) How many offspring an organism has the potential to
make
C) Individuals who are better adapted to their current
environment will survive better and pass their traits on to the
next generation
D) Survival of the fittest
E) Both C and D
Can you give an example of natural selection occurring?
2. Name that Proof!!
1) This proof of evolution pushes back the age of the
Earth allowing for a longer period of time for organisms
to change:
2) This proof of evolution shows that creatures disappear
and appear on the Earth at different times
3) The fact that the backbone is one of the earliest
structures to appear in all vertebrates is an example of
what proof of evolution?
A.Embryonic Development
B. Fossil Record
C. Extinction
ANSWERS to Name that Proof!!
 1) Fossil Record
 2) Extinction
 Why is Extinction proof of evolution by natural
selection?

creatures who are not best adapted to their environment will
die off.
 3) Embryonic Development
3. Fill in the blanks!
 Adaptive Radiation is an increase in the
___________________ and ______________________
diversity of a species eventually resulting in formation
of new ___________
A) environmental, social, finches
B) niches, trait, lizards
C) morphological, ecological, species
D) natural selection, trait, species
4. New species of finches in the Galapagos Islands, and
mammal diversity after dinosaur extinction are both examples
of _____________________
 A) Organism growth
 B) Convergent evolution
 C) Adaptive Radiation
 D) Divergent evolution
 E) Both C and D
5. Are the following examples of Homologous
structures or Analogous structures?
Example:
Analogous or homologous?
Bat forelimb and human forelimb
homologous
Bat wing and insect wing
analogous
Mole forelimb and elephant forelimb
homologous
Tail fin of whale, fish, and lobster
analogous
Jointed legs of insects and vertebrates
analogous
6. Convergent or Divergent?
 Homologous Structures show ____________________




evolution
Analogous Structures show _____________________
evolution
Recall:
convergent evolution: one species evolving into many
species
Divergent evolution: many species showing the evolution
of a similar trait, but they are not closely related