Multiple Choice
Which of the following is not one of the three main principles of evolution?
22. Evolutionary Genetics
Overview of Evolution
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How do comparisons of amino acid sequences in proteins provide evidence for evolution?
A
Differences in amino acid sequences are unrelated to evolutionary relationships.
B
Amino acid sequences only change due to environmental factors, not evolution.
C
Amino acid sequences are identical in all organisms, indicating no evolutionary change.
D
Similar amino acid sequences in different species suggest a common ancestry.
Verified step by step guidance1
Understand that proteins are made up of amino acid sequences, which are determined by the genetic code in DNA.
Recognize that during evolution, mutations accumulate in DNA, leading to changes in amino acid sequences of proteins over time.
Compare the amino acid sequences of the same protein from different species to identify similarities and differences.
Interpret that a higher similarity in amino acid sequences between species suggests they share a more recent common ancestor, indicating evolutionary relatedness.
Conclude that these comparisons provide molecular evidence supporting the theory of evolution by showing how species diverged from common ancestors.
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