Final Flashcards
(28 cards)
What is the pneumonic for time periods?
Potatoes can’t orally speak, Devon can’t peter just cuz patttys neat
Time period with origin of animals
End of Precambrian
Time period with transition to land
Ordovician
Time period with origin of seed plants
Carboniferous
Time period with dinosaur extinction
Cretaceous
Time period with radiation of mammals
Paleogene
Time period with transition from fern to gymnosperm
Permian
Time period with origin of angiosperms
Cretaceous
Time period with origin of primates
Neogene
What is the order of human descendants from oldest to youngest
Chimpanzee, ardipithecus, Australopithecus, homo erectus, human
What are the main characteristics of deuterostomes
Radial cleavage and indeterminate cell fate, blastopore forms anus, major group of protostomes
What are the two main groups of deuterostomes?
Ambulacraria and chordata
What is a unique characteristic of ambulacraria?
Exclusively marine
What are the two branches of ambulacraria?
Echinoderms and hemichordates
Which organisms are echinoderms?
Sea cucumbers, sea urchins, sea stars, brittle stars, sand dollars, and feather stars
Which organisms are hemichordates?
Acorn worms
What is a defining characteristic of hemichordates?
They have lost bilateral symmetry and a brain
What are the three groups in chordata?
Cephalochordates, urochordates, and vertebrates
Which organisms are cephalochordates?
Lancelates
Which organisms are urochordates?
Tunicates and salps
What is characteristic of urochordates?
They live in colonies or are pelagic
What is a characteristic of cephalochordates?
The adult retains all chordate characteristics
What are characteristics of chordates
Notochord, pharyngeal gill slits, post anal tail
James Huttons theory
Theory of uniformitarianism
