Test 2 Prep Flashcards
Differences in courtship behavior are an example of post zygotic barriers to mating.
F. Prezygotic
A small isolated population is more likely to change into a new species than a large population.
T.
The most metabolically diverse organisms are the prokaryotes
T.
Reptiles represent a polyphyletic phylogeny
F. Paraphyletic
A phylogeny is constructed using analogous characters
F. Homologous
Flatworms have a true body cavity or coelom
F. No Coelom / Acoelomate
The prezygotic barrier where gametes are unable to recognize each other due to different molecular receptors is called mechanical isolation
F. gametic isolation
Allopolyploidy is a form of sympatric speciation that involves errors in meiosis and hybridization between two different species of organisms
T.
Sponges are the first animals with true tissues
F. No tissues. Cnidarians or Jellyfish Okay
birds and mammals independently evolved a high metabolism
T
One of the 4 characteristics of all chordates is extreme cephalization.
F. Notochord, dorsal nerve cord, muscular tail, gill/ pharyngeal slits- give any one of these chordate characteristics. Vertebrates may have extreme cephalization, but it is not a defining character- more primitive
When a horse and donkey mate, they produce mules that are sterile. This is an example of postzygotic isolation
T.
Homeotic genes contribute to evolutionary novelty by altering an organisms body plan.
T.
Viruses (e.g. influenza ) are subject to natural selection processes.
T.
After the demise of dinosaurs, the process by which mammals diversified into new species as they filled newly opened ecological niches is called adaptive radiation.
T.
