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51 Cards in this Set
- Front
- Back
Extant most recent common ancestor of Amphibia |
Amniota |
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Extinct most recent common ancestor of Amphibia |
Temnospondyls (Brachiosaurus) |
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Period of insect diversification (era and date) |
Carboniferous (360-285 mya) |
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Period of vascular plant formation and first tetrapods (era, date) |
Devonian (408-360 mya) |
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Period where first jawed fishes formed (era, date) |
Silurian (438-408 mya) |
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Two groups of fishes which diversified from the Silurian period |
Actinopterygian (radial-finned fishes) Sarcopterygian (lobed-finned fishes) |
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Organism linking the transition of water to land |
Tikaalik roseae |
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First early aquatic tetrapod |
Acanthostega gunnari |
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Define the North American Breeding Bird Survey |
Organized 4100 survey routes across country, 24.5 mile transects, run by Canadian wildlife and US geological survey, 5 hour survey During breeding season? |
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Christmas bird count |
One count on christmas per year. Groups sample a 15-mile radius circle |
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First true land tetrapod |
Ichthyostega |
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Diversification of reptiles (age, dates) |
Permian (285-245 mya) |
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Group including all extant amphibians |
Lissamphibia |
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3 Orders of Class Amphibia |
Gymnophonia, Caudata, Anura |
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Common ancestor of salamanders and frogs |
Gerobatrachus hottoni |
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Ancestor of all mammals that arose in the Permian |
Therapsids |
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Extant classes in Lepidosauria |
Tuatara, Squamata |
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3 Orders of Squamata |
Serpentes, Lacertilia, Amphisbaenia |
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Groups in Archosauria |
Crocodyllians, Dinosauria |
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Saurischian vs. Ornithischian dinosaurs |
Saurischian contained Theropod dinosaurs (ancestor of birds), Ornithsian dinos (mistakenly named bird-hipped dinos due to their fused hipbones) |
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Two theories of bird origins |
Theropod dinosaurs (more evidence), Thecodont reptiles in the triassic |
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Feathers were originally used for: |
Thermoregulation, mate attraction |
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Which dinosaur showed evidence for gliding with wings on fore and hind legs? |
Microraptor Gui |
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Two theories for evolution of flight |
Aboreal vs. Cursoreal |
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Two theories for when major groups of birds evolved |
Tertiary (Big Bang),Cretaceous diversification |
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Traits of modern birds |
bipedal, feathered vertebrates with wings Endothermic Well-developed brains Richly provisioned eggs sexual selection |
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4 types of wings to support different types of flight |
High aspect ratio Elliptical High Speed Slotted |
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Critisims of the Biological Species concept |
Does not account for: Asexual organisms, allopatry and hybridization |
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Many species concepts encompass: |
Morphological similarity Ecological similarity Reproductive isolation Evolutionary cohesion |
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Four models of speciation |
Allopatric, Peripatric, Parapatric, Sympatric |
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Define Jordan's Law |
Closely related populations usually have undergone allopatry speciation |
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Fourier analysis |
Any complex sound can be viewed as a series of sin waves |
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Are lower or higher frequencies best heard in a forest ? |
Low frequencies: wavelength is longer and therefore is less obstructive and can move through a forest without hitting an object and being dispersed |
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Why do bird birds make lower-pitched sounds than smaller birds? |
Syrinx is larger and can propagate a larger amount of air molecules. An object has difficulty producing sound with wavlengths larger than it is |
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Why are some bird sounds easy to localize while some are not? |
Harder to localize calls have a constant frequency. Can usually tell songs are farther by a loss of frequency or a change between two ears. |
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Why do birds migrate? |
Exploit seasonal food resources Food a good breeding site Avoid predation Avoid climatic extremes |
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What is the trade-off in reproduction and survival for residents and migrants? |
Tropical resident (high survival, low reproduction ), Migrant (med, med), Temperate resident (low, high) |
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Bird navigate using: |
Sun compass, star compass, magnetic field, olfaction, infra-sound |
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Which traits of migration are inherited? |
Direction, length, feeding behaviuor, timing |
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3 Ways birds produce color |
Pigments (absorbtion), irridensence (interference), structure (Rayleigh scattering) |
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Types of avian mating systems |
Social monogamy Polygyny Polyandry Polygynandry |
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5 Great Mass Extinctions |
Late Cambrian, Late Ordivician, Late Devonian, Late Permian, Late Cretaceous |
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Main modern causes of extinction |
Habitat destruction, introduced species, climate change |
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Amphiban decline |
32% of amphibian species threatened with extinction |
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Predicted trend of human pop growth |
Overall not sure, but think it may stabilize around 9-10 billion |
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3 Main major threats to birds worldwide |
Agriculture, logging, invasive species |
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Out of all birds, which percent of them are red-listed? |
%12 |
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Aside from humans, what is the most abundant species of large mammals? |
White-tailed deer (40-50 million) |
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What is the global level for CO2 (ppm) |
402 ppm |
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Explain the tragedy of the commons |
Too much freedom is bringing ruin, each persona takes as much as they can for themselves. Must impose mutually agreed limits |
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Paris Agreement |
Goal of 195 countries to lower emission limits to keep global surface warming below 2C |