The film discusses the characteristics and classifications of chordates, a group of animals that includes vertebrates and some simpler forms. Key features of chordates include a pharyngeal breathing ...

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. When French biologist Jean-Baptiste Lamarck set out to categorize ...

The cradle of vertebrate evolution was limited to a zone of shallow coastal waters, no more than 60 meters deep. In those waters, fish — the first vertebrates — appeared roughly 480 million years ago, ...

Introduction to freshwater invertebrates / James H. Thorp and Alan P. Covich -- An overview of freshwater habitats / James H. Thorp and Alan P. Covich -- Protozoa / William D. Taylor and Robert W.

Although less familiar as flower visitors than insect pollinators, vertebrate pollinators are more likely to have coevolved tight relationships of high value to the plants they service, supplying ...

AbstractThe usefulness of ecoregions and catchments (hydrologic units) as bases for classifying aquatic vertebrate assemblages in western Oregon was compared using samples collected by electrofishing ...

A mass extinction of fish 360 million years ago hit the reset button on Earth's life, setting the stage for modern vertebrate biodiversity, a new study reports. The mass extinction scrambled the ...

Evidence that the first widespread occurrence of terrestrial vertebrates 300 million years ago was in response to a brief episode of a globally warmer, drier climate Fedexia was described on the basis ...

Bees are not the only animals that carry pollen from flower to flower. Species with backbones, among them bats, birds, mice, and even lizards, also serve as pollinators. Although less familiar as ...