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progressive evolution

A Dictionary of Earth Sciences
© A Dictionary of Earth Sciences 1999, originally published by Oxford University Press 1999.

progressive evolution Steady, long-term improvement of evolutionary grade, which has allowed plants and animals to become ever more independent of the aquatic environment in which they first evolved. For example, the sequence bryophyte to pteridophyte to gymnosperm to angiosperm represents a progressive evolutionary trend.

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progressive evolution

A Dictionary of Ecology
© A Dictionary of Ecology 2004, originally published by Oxford University Press 2004.

progressive evolution A steady, long-term improvement of evolutionary grade, which has allowed plants and animals to become ever more independent of the aquatic environment in which they first evolved. For example, the sequence bryophyte, pteridophyte, gymnosperm, angiosperm represents a progressive evolutionary trend.

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progressive evolution

A Dictionary of Plant Sciences
© A Dictionary of Plant Sciences 1998, originally published by Oxford University Press 1998.

progressive evolution A steady, long-term improvement of evolutionary grade, which has allowed plants and animals to become ever more independent of the aquatic environment in which they first evolved. For example, the sequence bryophyte, pteridophyte, gymnosperm, angiosperm represents a progressive evolutionary trend.

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progressive evolution

A Dictionary of Zoology
© A Dictionary of Zoology 1999, originally published by Oxford University Press 1999.

progressive evolution A steady, long-term improvement of evolutionary grade, which has allowed plants and animals to become ever more independent of the aquatic environment in which they first evolved.

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