The ________ (discovered in Australia in 1969) included sugars and over 70 distinct amino acids, lending support to this notion.
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Inorganic materials
________ found in Earth's early atmosphere reacted to form the building blocks of living molecules.
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distinct species
Plants that generate extra sets of chromosomes are frequently unable to interbreed with plants that retain the original number of chromosomes, and hence evolve into a(n) ________ over time.
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Phylogeny
________ is the study of the evolutionary history of a species or group.
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Adaptive radiation
________, the development of organisms into diverse species that occupy different ecological niches, can result from speciation.
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sexual selection
In animals, ________ can also result in sympatric speciation.
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Meteorites
________ are considered to have battered early Earth.
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Morphological evidence
________ from fossils reveals features that are acquired or lost over time, which may be utilized to build phylogenetic trees.
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Human
________- caused ecological pressures, like as habitat degradation or overhunting, can raise extinction rates.
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Prezygotic
________ or postzygotic reproductive obstacles can induce speciation.
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Extinction
________ (the extinction of all individuals of a species) has occurred throughout Earth's history, as evidenced by the fossil record.
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Phylogenetic trees
________ and cladograms are theories regarding the evolution of organisms across time, with ________ reflecting the approximate timing of evolutionary events.
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Postzygotic barriers
________ exist after the zygote is produced and prevent it from maturing into a viable and fruitful adult organism.
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evolution of new species
The ________ is referred to as speciation.
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Prezygotic barriers
________ are impediments that inhibit the creation of a zygote, or fertilized egg.
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