Exam 1 biol 1108 Flashcards
The only evolutionary process that leads to adaptive change
natural selection
Conditions for hardy-weinberg equilibrium
no natural selection, no mutations, no migration, large population, random mating
directional selection
selection of one of the extremes
elephant seals hunted to near extinction
drift with bottleneck effect
change in allele frequencies in a population
evolution
movement of alleles between populations
gene flow
a few individuals colonize a new island
drift with founder effect
a population drastically decreased due to famine
drift with bottleneck effect
genetic drift
random change in allele frequency due to predation; bottleneck and founder effects are types of this
in a phylogenetic tree, a node represents …
a common ancestor from which the descendent diverged
When comparing phylogenetic trees showing various hypotheses, the tree with ________ would be the weakest candidate
most changes
Molecular phylogenies show all land plants are a monophyletic group, what does this suggest?
single transition from aquatic to terrestrial
Why do we believe that at the least male Homo sapiens neanderthals mated with non-African ancestral Homo sapiens sapiens?
because neanderthal nuclear DNA sequences are present in the human gene pool
How old is Lucy
3.2 million
True or false: red tides are caused by organisms in the Superkingdom Ranelamintha
false
