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26 Cards in this Set
- Front
- Back
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abioltically produced polypeptides
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proteinoids
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precursors to cells
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protobionts
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experimentally and abiotically produced protobionts that have some selectively permeable qualities
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mircospheres and coacervates
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two or more species that originate from same ancestor
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divergent evolution
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two unrelated species that share similar traits due to similar ecological conditions
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convergent evolution
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two related species or related lineages that make evolutionary changes after diverging from common ancestor
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parallel evoluion
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evolution of one species in response to new adaptations that appear in another species; predator and prey
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coevolution
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prezygotic isolating mechanism; when species do not encounter
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habitat isolation
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when species mate during different seasons or different times of day
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temporal isolation
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when species does not recognize another species mating partner because dont understand courtship rituals
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behavioral isolation
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genitalia structurally incompatible
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mechanical isolation
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when male gametes do not survive in female gamete's environment
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gametic isolation
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zygote fails to develop properly and aborts before reaching reproductive maturity
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hybrid inviability
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hybrids become functional adults but reproductively sterile
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hybrid sterility
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hybrids produce offspring that have reduced viability or fertility
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hybrid breakdown
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rapid evolution of many species from single ancestor due to diverse geographic or ecological conditions
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adaptive radiation
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two species mate and prdouce progeny along a geographic boundary called hybrid zone
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hybridization
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formation of new species without geographic barrier
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sympatric speciation
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more than normal two sets of chromosomes found in diploid cells ; due to nondisjunction during meiosis
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polyploidy
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similarly colored insects are reproductively isolated from other subpolulation and gene pool diverges
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balanced polymorphism
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population divided by geographic barrier so that interbreeding between two population prevented
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allopatric speciation
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random increase or decrease of alleles
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genetic drift
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allele frequencies in group of migrating individuals are not the same as that of their population of origin
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founder effect
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population undergoes dramatic decrease in size; becomes vulnerable to genetic drift
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bottleneck
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when least common phenotype have selective advantage; phenotypes alternate between low and high frequencies
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frequency dependent selection; example of balanced polymorphism
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superior quality of offspring resulting from crosses between two different inbred strains of plants
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hybrid vigor; example of balanced polymorphism
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