Species - A population or group of populations whose members have the potential to interbreed in nature and produce viable, fertile offspring, but do not produce viable, fertile offspring with members of other groups., Speciation - An evolutionary process in which one species splits into two or more species., Temporal isolation - Closely related species are prevented from interbreeding because they reproduce at different times (such as different seasons, months, or times of day) reducing gene flow., Sympatric speciation - the formation of new species and populations that live in the same geographic area., Reduced hybrid viability - Hybrid offspring may have lower survival rates or overall fitness compared to purebred individuals., Macroevolution - evolutionary change above the species level. Example: the origin of a new group of organisms through a series of speciation events. , Divergent evolution - The evolution of distinct features from a common ancestor leading to speciation., Gametic isolation - When the gametes (sperm and egg) of two different species are incompatible, preventing fertilization., Habitat isolation - When two closely related species do not mate because they inhabit different environments within the same geographic area., Prezygotic barrier - A reproductive barrier that impedes mating between species or hinders fertilization if interspecific mating is attempted., Behavioural isolation - Differences in behaviour prevent individuals from different species (such as courtship rituals, mating calls, or specific behaviors during the mating process) from mating. , Reduced hybrid fertility - Hybrid offspring may be sterile or have reduced fertility, making it difficult for them to produce viable offspring., Hybrid breakdown - The first-generation hybrids may be viable and fertile, but subsequent generations might experience reduced viability or fertility., Convergent evolution - The evolution of similar features in independent evolutionary lineages., Microevolution - Evolutionary change below the species level; change in the allele frequencies in a population over generations., Biogeography - The study of how species are distributed geographically across Earth, both in present times and throughout history. It provides insight into species' evolution, extinction, and migration patterns., Postzygotic barrier - A reproductive barrier that prevents hybrid zygotes produced by two different species from developing into viable, fertile adults., Mechanical isolation - When the genitalia of two species are incompatible, preventing successful mating., Punctuated equilibrium - In the fossil record, long periods of aparent stasis, in which a species undergoes little or no morphological change, interrupted by relatively brief periods of sudden change., Gradualism - Suggests evolution occurs slowly and steadily over a long period of time, with small genetic changes accumulating to bring about large changes., Allopatric speciation - The formation of new species in populations that are geographically isolated from one another., Adaptive radiation - Period of evolutionary change in which groups of organisms from amny new species whose adaptations allow them to fill different ecological roles in their communities.,

Speciation Vocabulary

by
Print
Embed

Leaderboard

Visual style

Options

Switch template

Continue editing: ?