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37 Cards in this Set

  • Front
  • Back
with what is the evolution of animals believed to begin?
Marine protists
in what period did multicellular organisms with hard parts appear?
Cambrian
what significant event happened at the end of the paleozoic era?
Mass extinctions wiping out 95% of animal species.
What was significant about the ordovician period?
Developement of land plants. First fish and vertabrae. Extinctions encouraged adaptive radiation.
Silulrian?
Movement of species on to land due to adaptive radiation.
Homologus structures
Exist in two different species due to a common ancestry. (forelimbs on salamanders and opossum)
Analogus
Similar due to common function (wings on birds and insects)
Convergent evolution
Particular characteristic evolves in two separate populations.
What is the name of the earliest known hominid? When and where was it found?
Austalopthecus. Africa, 1970.
What is the name of the oldest known fossil of the human genus?
Homo Erectus. 1.8 million years old.
Another name for the oldest fossils to be designated homo sapiens.
Cro-Magnon man
Life history strategies
characteristics that differentiate the type of species that better develope in a new ecosystem as opposed to an established equilibrium.
Equilibreal life strategies (K-selected)
Long life spans, long maturation, low mortality, reproduce sexually, raise offspring, stay within established borders.
Altruism
Does not benefit the individual but benefits the community.
kin selection
a form of natural selection that favors altruistic behavior toward close relatives resulting in an increase in the altruistic individual's genetic contribution to the next generation.
Taxonomy
Organization of living thinggs based on morphology or genetics.
Who developed taxonomy?
Carolus Linnaeus.
How is a species named?
Binomial nomenclature. Genus, Species.
What are the seven levels of classification?
Kingdom, Phylum, Class, Order, Family, Genus, species.
Phylogenetic tree
evolutionary family tree of species
What are the three domains?
Archaea, Eubacteria, Eukaryota
Archaea
Prokaryotic, unique RNA, extreme ecosystems. Methan producing. Withstand high temperatures and salinity.
Eubacteria
Prokaryotic organisms known as bacteria.
Eukaryota
Contains all organisms possession eukaryotic cells.
Kingdoms in Eukaryota
Protista, Fungi, animalia, plantae
Protista
27 phyla/250000+ species. Photosynthesis, some ingestion and absorbtion. Large Eukaryotic cells. Algae, protozoa.
Fungi
5 phyla/100000+ species. Absorbtion. Multicellular eukaryotic filaments. Mold, mushrooms, yeast, mildew.
Animalia
33 Phyla/1,000,000+ species. Ingestion. Multicellular specialized eukaryotic motile cells. Worms, sponges, fish, reptiles, amphibians, birds, mammals.
Plantae
10 phyla, 250,000 species. photosynthesis. nonmotile cells.
What are the 9 major phyla in the kingdom Animalia?
porifera - sponges, cnidaria - jellyfish, platyhelmithes - flat worms, nematoda - round worms, mollusca - snails/squid, annelida - segmented worms/earthworms, arthropoda - crabs/spider, echinodermata - sea stars/sand dollar, chordata - fish/amphibians reptiles/birds/mammals
what are the three subphyla of the phylum chordata?
Uchordata(animals with tail cord/tunicates) Cephalchordata(head cord/Lampreyes) Vertebrata (backbone)
what two sper classes is the subphylum vertebrata divided into?
Agantha (no jaws) gnathostomata (with jaws)
What are the six classes in the superclass gnathostomata?
Chondrichthye, osteichthyes, amphibia, reptilia, aves, mammalia.
Chondrichthyes
fish cartiloginous exo skeleton, two-chambered heart, gills with bony gill arches, external fertilization (sharks, rays)
Osteichthyes
fish bony skeleton, numerous vertebrae, swim bladder, two-chambered heart, gills with bony gill arches, external fertilization. (carp, tuna)
Amphibia
bony skelton, four limbs, webbed feet with four toes, cold-blooded, larg mouth with small teeth, three-chambered heart, separate sexes, internal/external fertilization, amniotic egg. (salamander, frog.)
Reptilia
Horny epidermal scales, paired limbs with five toes. Bony skeleton. Lungs, no gills. Three chambered heart. Cold blooded. Internal fert. Separate sexes, egg laying. (snakes, Lizards)