BIOL 1070 Lecture Notes - Lecture 5: Atlantic Cod, Endemism, Local Extinction
31 Jan 2017
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Green is more closely related to red than white. Clade: group of organisms that consists of a common ancestor and all its lineal descendants. Paraphyletic: not a clade (missing either common ancestor or at least one descendant) Lineages of all living (extant) species have been evolving for exactly the same amount of time because they all go back to a shared ancestor: ***posted paper*** Penguins have evolved to become flightless birds: adaptation of mussels. Whales have a pelvis but no legs. Humans have tail bones but no tails. Global diversity is the net outcome of two opposing processes: speciation: increase in biodiversity, extinction: decrease in biodiversity. One cannot explain the diversity of life without understanding these two components of evolutionary history. Niche partitioning: three different species eat the same thing from different spots. Seeds transported by migratory birds or introduced by humans?: vicariance: it evolved elsewhere, but the physical landscape itself changes (ex.
