progressive evolution

All Sources -
Updated Media sources (1) About encyclopedia.com content Print Topic Share Topic
views updated

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.

A Dictionary of Earth Sciences AILSA ALLABY and MICHAEL ALLABY
views updated

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.

A Dictionary of Plant Sciences MICHAEL ALLABY
views updated

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.

A Dictionary of Ecology MICHAEL ALLABY
views updated

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.

A Dictionary of Zoology MICHAEL ALLABY