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