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 ...

Go back far enough in our history–maybe about 650 million years–and you come to a time when our ancestors were still invertebrates. That is, they had no skulls, teeth, or other bones. They didn’t even ...

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

Reconstructing history: aims and methodology -- The origin of vertebrates: invertebrate chordates and cyclostomes -- The origin of jaws and paired fins: the age of fishes -- The invasion of land: lobe ...

A hundred years since microbiologists first discovered the invertebrate immune system, they are just beginning to understand its complexity. Scientists recently discovered that invertebrates have ...

Q: Have any modern animals adapted to human activity through natural selection? Mike Anglin | Dallas, Texas Human-caused factors have led to anatomical changes in both vertebrates and invertebrates.

A new exhibit at Butterfly Pavilion offers insight into the evolution of its invertebrate residents, as well as humans and other vertebrates. For millions of years, Earth was home to single-celled ...

Invertebrates such as spiders and centipedes are underappreciated kings of the jungle, eating a surprising amount of vertebrates in the Amazon, a new study says. Biologists recently documented 15 ...