Charles Darwin Exam 3 Questions with Complete Solutions
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Charles Darwin
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Charles Darwin
Charles Darwin Exam 3 Questions with Complete Solutions
What is a variation? - Answer-A slight difference in an inherited trait of individual members of a species.
What causes variations? - Answer-They are caused by random mutations, or changes, in genes.
What is phenotype? - Answer-All the...
Charles Darwin Exam 3 Questions
with Complete Solutions
What is a variation? - Answer-A slight difference in an inherited trait of individual
members of a species.
What causes variations? - Answer-They are caused by random mutations, or changes,
in genes.
What is phenotype? - Answer-All the observable traits and characteristics of an
organism.
What is Darwin's theory called? - Answer-Evolution by natural selection
What is natural selection? - Answer-The process by which populations of organisms
with variations that help them survive in their environments live longer, compete better,
and reproduce more than those that do not have the variations.
How does natural selection apply to the tortoises? - Answer-It explains how the tortoises
became matched to their food sources (long necks for tall cacti vs. short necks for short
grass).
What role do variations have in the theory of evolution by natural selection? - Answer-
They allow organisms to adapt to their environments which allows that organisms to
survive longer.
What happens to the organisms that do not have variations? - Answer-They die much
sooner which means they do not have offspring and, as a result, their genes no longer
get passed on.
What is an adaptation? - Answer-An inherited trait that increases an organism's chance
of surviving and reproducing in its environment. It is an accumulation of many similar
variations.
What are the three categories of adaptations? - Answer-Structural, behavioral and
functional
What are structural adaptations? - Answer-Adaptations that involve color, shape and
other physical characteristics (ie. the shape of a tortoises neck).
What is a behavioral adaptation? - Answer-Adaptations that involve the way an
organism behaves or acts. (ie. hunting at night or moving in a herd)
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