BIOL1101 Lecture Notes - Lecture 9: Ribosomal Rna, Ribosomal Dna, Polyphyly
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9.
Snapping shrimp used to be able to swim from the Atlantic Ocean to the Pacific Ocean by traveling between North and South America. However, when the Isthmus of Panama appeared (a land bridge that connects the Americas), the shrimp could no longer travel between the oceans and evolved into different species. This an example of
sympatric speciation | ||||||||||||||||||||||||||||||||||||||
allopatric speciation | ||||||||||||||||||||||||||||||||||||||
punctuated speciation | ||||||||||||||||||||||||||||||||||||||
genetic drift 10. Which of the following refers to a structure that is similar because of descent from a common ancestor (e.g. a human leg and a whale fin)?
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