Download ReviewQuestionsforChpt.7

Question #1
How can you tell that
Organisms are members of
the same species?
Answer #1
Organisms are members of the
same species if they mate with each
other and produce fertile offspring.
Question #2
How does the fossil record show
that species have changed over
time?
Answer #2
Fossils of types of organisms that no
longer exist are found. These fossils
form a sequence of change and
adaptation of populations of
organisms over time.
Question #3
Why did the finches Darwin saw on
the Galapagos Islands look similar
to those he saw in South America?
Why did they look a little different?
Answer #3
Darwin hypothesized that the island
finches were alike because they
descended from the same ancestor.
Darwin hypothesized that the island
finches were different because they had
evolved adaptations for their
environments.
Question #4
Explain Natural Selection.
Answer #4
Natural selection is the process by
which organisms that are better
adapted to their environment
survive and reproduce more
successfully than less well adapted
organisms do.
Question #5
Describe the four parts of Darwin’s
theory of evolution by natural
selection.
Answer #5
1. Overproduction: Every organism can produce more
offspring that will likely survive.
2. Inherited Variation: All offspring will have some
differences
3. Struggle to Survive: The offspring have to compete
with each other and with other organisms around
them.
4. Successful Reproduction: Those that are best
adapted will probably have more offspring like
themselves.
Question #6
Identify two ways that organisms
can be compared to provide
evidence of evolution from a
common ancestor.
Answer #6
Living organisms can be compared
in terms of body structures with
other living organisms and with
organisms from the fossil record.
Also, the DNA of living organisms
can be compared.