Multiple Choice
Species A and species B are in the same phylum. Species A and species C, but not species B, are in the same order. From this information you can conclude that __________.
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25. Phylogeny
Phylogeny
Multiple Choice
Which of the following methods to establish phylogenetic relationships among organisms has been developed most recently?
A
Comparing morphology (shape and structure)
B
Comparing physiology (the functioning of structures and systems)
C
Comparing behavioral patterns
D
Comparing embryonic development
E
Comparing the amino acid sequences of proteins and nucleotide sequences of nucleic acids
Verified step by step guidance1
Understand that phylogenetic relationships refer to the evolutionary connections between organisms, often depicted in a tree-like diagram called a phylogenetic tree.
Recognize that traditional methods of establishing these relationships include comparing morphology, physiology, behavioral patterns, and embryonic development. These methods rely on observable traits and characteristics.
Identify that the most recent method involves molecular biology techniques, specifically comparing the amino acid sequences of proteins and nucleotide sequences of nucleic acids. This approach allows scientists to examine genetic material directly.
Learn that molecular comparisons provide a more precise and objective measure of evolutionary relationships because they reflect genetic changes over time, which may not be apparent in physical or behavioral traits.
Appreciate that advancements in technology, such as DNA sequencing, have facilitated this molecular approach, making it a powerful tool in modern phylogenetics.
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