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40 Cards in this Set
- Front
- Back
The process of evolutionary changes that result in formation of a new species and groups is called... |
MacroEvolution |
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What are the traits common used to identify species? |
Morphological traits, ability to interbreed, molecular similarity(DNA), ecological factors, evolutionary relationship. |
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species are identified based on unique combinations of physical or molecular characteristics under the... |
Phylogenetic species concept |
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A group of individuals that can interbreed in nature and produce viable offspring would be considered to be a species according to the... |
Biological species concept |
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Dandalions are plants that produce fruitlike propagudes that are actually produced asexually. Sexual reproduction is very rare in this organism Which species concept would be the LEAST useful in defining dandelions as a species? |
Biological species concept |
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THe pace of evolution may change due to sudden environmental shifts such as climate change. This may result in rapid evolution. (true/false) |
true. Evolution has no constant speed. |
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American sycamore and European Sycamore are tree species that will interbreed if planted nearby but will not normally interbreed because they occur on different continents. This is an example of... |
Habitat isolation |
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During the spring time in main, male moose often enter a cow pasture and begin calling the female cows. The moose may even try to mount the female, but the male genitalia do not fit properly. This is an example of... |
mechanical isolation |
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Two species of salamander have similar ranges, but one breeds from January toMarch, while the second one breeds from March to May. This is an example of |
temporal isolation |
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A frog and a toad mate. The frog drops its sperm onto the toad’s eggs as theyare being laid, no offspring develop because the sperm cannot fertilize egg. This is anexample of |
Gametic Isolation |
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Frog croak at night to allure females for mating. Females are attracted only tothe croaks of their own species. this is an example of |
Behavioral isolation |
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A liger is a result from a male lion and a female tiger. Male ligers are usuallysterille. This is an example of |
Hybrid Sterility |
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3.5 million years ago the Isthmus of Panama formed. This new landmassseveed the connection btw the pacific ocean and the caribbean sea. An ancestralfish pop. was split in two by this event..the two pop. no longer interbreed and aretwo diffeent species. This type of speciation is |
allopatric speciation |
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Storm blows a small group of birds off course and they land on an island toofar from the mainland for them to fly back on course. The birds remain on the islandfor 100 generations when a second storm blows more birds from the mainland tothe island. The new birds cannot mate with the est. birds. What has occured |
Geographical isolation resulting in reproductive isolation |
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Allopatric speciation occurs because a population... |
becomes geographically isolation and undergoes genetic change |
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Species evolve continuously over long spans of time according to the conceptof |
gradualism |
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Morphological traits are... |
physical traits |
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Reproductive isolation is... |
inability to breed |
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molecular features are... |
DNA differences between organisms |
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Ecological factors are.. |
Different habitats |
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Evolutionary Relationships are.. |
fossil records and DNA analysis |
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Biological Species Concept... |
group of individuals capable of interbreeding |
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Evolutionary Lineage Concept... |
species defined based on the separate evolutionary lineage |
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General Lineage Concept.. |
Each species forms a group with a particular set of characteristics |
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Ecological Species Concept... |
each species occupies an ecological niche. (unique habitat) |
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Habitat Isolation |
what it sounds like |
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Temporal Isolation |
reproduce at different times of the year |
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behavioral isolation |
different mating songs |
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mechanical isolation |
can't because body types different |
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gametic isolation |
gametes fail to unite |
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Hybrid Sterility |
makes a new animal but it is sterile |
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Hybrid Inavibility |
they can have sex, but no offspring is produced |
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Hybrid Breakdown |
Offspring is made, but it has genetic abnormalities |
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What is speciation? |
formation of a new species |
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Cladogensis? |
Division of a species into 2 or more. |
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Anagenesis? |
Single species transformed into another |
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Adaptive radiation? |
one species evolves into multiple other species differing greatly on habitat or behavior |
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Sympatric Speciation? |
Specialization without geographical isolation |
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Gradualism |
changes over a long period of time |
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Punctuated equilibrium? |
species remains relatively unchanged for many generations, but has short rapid bursts of change. |