EVOLUTION
WORKSHEET
PART A: Answer The Following with the help of given box:1) __A trait caused by the genes of an organism. Cannot change over the organism’s
lifetime.
2) __An adjustment an organism makes to better deal with its environment. Occurs
in the organism’s lifetime.
a. Acclimation
3) __Changes in an organism’s DNA
b. Adaptation
4) __Organisms that are better adapted to their environment
c. Analogous
d. Gene Flow
survive and reproduce.
e. Homologous
5) __Structure that comes from a common ancestor
f. Mutation
6) __Two structures that look similar but do not come from a
g. Natural Selection
common ancestor.
7) __When new organisms come into or out of a population.
__________________________________________________________________________________
8) __ The wings of bats, the flippers of whales, and the arms of humans all have the
same bone structure because they came from a common ancestor.
9) __There are two populations of wild horses: one that has mostly white horses
and one that has mostly brown horses. One day, a white horse wanders off and
decides to join the brown horse population, adding the white horse gene to the
brown horse population.
10)__Insects and Bats did not come from a common ancestor, but over time they
both developed wings.
11)__There are tan mice and white mice that live in the desert. The white mice are
more easily seen by snakes so over time, the tan mice become more prevalent
because they survive and reproduce.
12)__Because it is colder during the winter, the bears that live up north grow thicker
fur to protect them from the freezing temperatures.
h. Acclimation
i. Adaptation
j. Analogous Structures
k. Gene Flow
i. Homologous Structures
m. Natural Selection
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EVOLUTION
WORKSHEET
PART B: Answer The Following Questions in accordance with the above
given diagram:
1) Which species is most closely related to the bird?

2) Which species is least related to the bird?

PART C: Fill In The Following Blanks:
1. Gradual change in a species overtime is:
__________________
2. The idea that characteristics developed during an organism's life can be passed to
its offspring
___________________
3. Survival of the fittest
___________________
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EVOLUTION
WORKSHEET
4. Common characteristics between organisms of different species
_______________________
5. John-Baptiste is credited with developing the heritablity of
______________________ theory.
PART D: In the table below identify who said what.
Concept / Idea
(Darwin, Lamarck or both)
Darwin, Lamarck or Both
There is variation within a species
Organisms can only pass on traits they are
born with
The environment had something to do with
why organisms changed
Parents can pass on changes made in their
lifetime to their offspring
Organisms change because they want to
survive
Organisms cannot become extinct
Parents can pass on at least some of their
traits to their offspring
Certain traits helped organisms survive
better than organism without those traits
Species are still changing today
Natural Selection
Acquired Characteristics
Species have changed over time
PART E: Define the vocabulary words from the Chapter:
1.Species-
2.Evolution-
3.Natural Selection-
4.Variation-
5.Adaptation-
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EVOLUTION
WORKSHEET
PART F: On reason giraffes have long necks is so that they can reach the food
high in the tree top canopy. Explain how the giraffes got their long necks
according to Darwin and then how would Lamarck explain their long necks.
Darwin’s Explanation
Lamarck’s Explanation
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