front 1 The process by which one species splits into two of more species | back 1 speciation |
front 2 Changes over time in allege frequencies in a population | back 2 Micro-evolution |
front 3 The broad pattern of evolution above the species level | back 3 Macroevolution |
front 4 According to this concept a species, is a group of population whose members have the potential to interbreed in nature and produce viable, fertile offspring- but do not produce viable, fertile offspring with other such groups | back 4 Biological species concept |
front 5 The existence of biological factors that impede members of two spices from interbreeding and producing viable, fertile offspring | back 5 Reproductive isolation |
front 6 Offspring that result from an interspecific mating | back 6 Hybrids |
front 7 Block fertilization from occurring | back 7 prezygotic barriers |
front 8 Contribute to reproductive isolation after the hybrid zone is formed | back 8 Post zygotic barriers |
front 9 Two species occupy different habitats within the same area may encounter each other rarely, if ever, even though they are not isolated by obvious physical barriers | back 9 Habitat isolation |
front 10 Species that breed during different times of the day, or different seasons, cannot mix their gazettes | back 10 Temporal isolation |
front 11 Courtship rituals that attract mates and other behaviors unique to a species | back 11 Behavioral isolation |
front 12 Mating is attempted, but morphological differences prevent its successful completion | back 12 Mechanical isolation |
front 13 Sperm of one species Amy not be able to fertilize the eggs of another species | back 13 gametic isolation |
front 14 The genes of different parent species may interact in ways that impair the hybrids development or survival in its environment | back 14 Reduced hybrid viability |
front 15 Hybrids may be sterile. If the chromosomes of the two species differ in number or structure, meiosis in the hydride may fail to produce normal gazettes. | back 15 Reduced hydride fertility |
front 16 Some first generation hybrids are viable and fertile but when they mate wit one another or with either parent species offspring of the next generation are feeble or sterile. | back 16 hybrid breakdown |
front 17 Characterizes a species by body shape and other structural features | back 17 Morphological species concept |
front 18 Views a species in terms of its ecological niche, the sum of how members of the species interact with the nonliving and living parts of their environment | back 18 Ecological species concept |
front 19 Defines a species as the smallest group of individuals that share a common ancestor, forming one branch on the tree of life. Biologist trace the phylogenetic history of a speed by comparing its characteristics such as morphology or molecular sequences, with those of other organisms. | back 19 Phylogenetic species concept |
front 20 gene flow is interrupted when a population is divided into geographically isolated subpopulations | back 20 Allopathic speciation |
front 21 Speciation occurs in populations that live in the same geographic area. | back 21 Sympatric speciation |
front 22 A species may originate from an accident during cell division that results in extra sets of chromosomes | back 22 Polyploidy |
front 23 An individual that has more than two sets of chromosomes that are all derived from a single species | back 23 Autopolyploid |
front 24 When an infertile hybrid may be able to propagate itself asexually. In sesubsequent generations various mechanisms can change a sterile hybrid into a fertile Polyploid | back 24 Allopolyploid |
front 25 Sympatric speciation can occur if gene flow is reduced by what such factors? | back 25 Polyploidy, habitat differentiation, sexual selection |
front 26 A region in which members of different species meet and mate, producing at least some offspring of mixed ancestry | back 26 Hybrid zone |
front 27 Reinforcing reproductive barriers | back 27 Reinforcement |
front 28 What are 3 possible ways that hybrid zones can change over time? | back 28 Reinforcement, fusion, stability |
front 29 Describe these periods of apparent stasis punctuated by sudden change | back 29 Punctuated equilibria |