Download Nat.SelectionWKST

Name: ___________________________
Date: __________ Block: __________
Natural Selection and Evidence of Evolution
Natural Selection Words: Write the letter of the correct definition in the space
provided on the left.
1. __________ Adaptation
2. __________ Competition
3. __________ Natural Selection
4. __________ Fitness
5. __________ Variation
a) Inherited characteristics (ones that
are passed on through genetics) that
increases chances of survival
b) Organisms with traits well suited to
their environment survive and
reproduce at a greater rate than less
well-adapted organisms in the same
environment.
c) A growing population causes a
scarcity of resources.
d) Changes in the DNA sequences
e) Ability to survive and reproduce in a
specific environment.
Evidence of Evolution: Write the letter of the correct example for each concept
in the space provided on the left.
6. __________ Vestigial structures
7. __________ Homologous structures
8. __________ DNA sequence
9. __________ Fossil record
10. __________ Embryology
a) Remains of dead organisms
b) Similarities and differences in amino
acid sequences between organisms.
c) Related organisms have the same
bone structures.
d) In the early stages of development,
dogs, pigs, and humans resemble one
another.
e) Structures that have reduced in size
because they no longer serve an
important function.
Fill in the blanks using the vocabulary terms in the box below.
Variation
Natural Selection
Adaptation
Biodiversity
Common Ancestor
Isolation
Genotype
Phenotype
Interbreed
Natural selection could not occur without (11) ___________________________ and acts on
a(n) (12) _____________________. A trait that makes a species better suited to survive in
its environment is called a(n) (13) ____________________. A species is a group of
organism that has different features and cannot (14) ____________________ with other
organisms. All the evolutionary evidence including fossils point to organisms having
Name: ___________________________
Date: __________ Block: __________
a(n) (15) _____________________. Having a lot of different species living in a habitat is
called (16) _____________________.
What are the four principles of natural selection?
17.
18.
19.
20.