Which of the following cannot determine phylogenetic relationships?
A
Physiology
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B
Morphology
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C
Anatomy
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D
Embryology
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Solution
The correct option is A Morphology Phylogenetic relationship refers to the relative times in the past, that species shared common ancestors. Some organisms that appeared closely related in some respects, may seem more distantly related in other respects. So, morphology cannot determine phylogenetic relationships. Thus, option B is correct. Physiology, biogeography and embryology can determine phylogenetic relations in varying aspects.