Download more likely to survive. the red

Evolution Test
Review ~Mrs. Connor
Fossil
• the solidified remains or imprint of a
previously existing organism
Adaptation
• The opposable thumb allows humans to grasp objects
firmly
• Helped us survive over time
All organisms have DNA show that…
…All organisms came from a common ancestor.
Natural Selection
• Individuals in a population that have traits or
abilities that give them a competitive
advantage over other population members
and are more likely to survive.
the red-eyed tree frog
• In order for the red-eyed tree frog to produce
fertile offspring, it should mate with its own
species, which is…?
Earth is 4.6 billion years old!
1.Organisms can
develop adaptation
2.Species can die out
and be replaced
3.Evolution can occur
A Fossil Record
• An historical sequence of life of fossil species
is called a …?
...more likely those organisms are
extinct
~The
deeper in
the
Earth’s
crust
fossils
are found
the …?
Vestigial Structures
Whale’s hind-limb bones or our
wisdom teeth were once useful
structures called…?
Evolution
• Comparing different organism’s skeletal
structures, DNA, and cells all provide evidence
that supports the theory of ______________.
…survive and reproduce at a greater
rate than other organisms
Comparing human DNA with the DNA of gorillas,
mice, chickens, and frogs reveal that humans
have the fewest DNA differences with…
trilobite
PA’s State Fossil
Hawks use their sharp claws to
catch rodents for food. What
could happen to a hawk that was
born with smaller claws?
~They could have fewer
offspring than other hawks.
A volcanic eruption would most likely
cause a population of turtles to
become…
Adjustment of an
organism to its
environment
FEET
Lake Lizard
Desert Lizard
COLOR
paleontologists
Scientists who study fossils
Eras are characterized by:
…the types of animal that dominated the Earth at
that time.
mutations
The theory of evolution can be explained in part
by changes in an organism’s DNA known as…
According to Darwin, the four steps of natural
selection are:
•
•
•
•
1.
2.
3.
4.
overproduction
genetic variation
struggle to survive
successful reproduction
Relative Dating
The method of determining the age of a fossil…
Human time span is short compared
with…
…The geological time scale
Most species today have…
…become extinct
Mesosaurus became extinct before the split
• Fossils of Mesosaurus have been found in
African and South America. The continents
were once attached.
• Explain.
Essay question:
Insects resistant some chemicals
1.
2.
3.
4.
Some bugs are resistant to chemicals
These bugs reproduce.
Those non-resistant bugs died out.
All that’s left are the resistant bugs.
Did humans evolve from present day
monkeys?
NO, we just
share their
DNA.
~First animal?
Answer: Jellyfish
~First land animal?
Answer: millipede
Darwin’s ship that traveled to the
Galapagos Islands…?