Articles about "vertebrates"
A Guide to Vertebrates and Invertebrates
Among the most fundamental criteria by which animals are sorted is whether or not they possess a backbone. This distinction places an animal into one of two ...
http://animals.about.com/od/zoologybasics/a/vertinvert.htm
The Basics of Vertebrate Evolution
Vertebrates are well-known group animals that include mammals, birds, reptiles, amphibians, and fish. The defining characteristic of vertebrates is their ...
http://animals.about.com/od/evolution/a/vertebrateevolu.htm
Ray-Finned Fishes - Actinopterygii
Ray-Finned fishes or 'actinopterygiians' (Actinopterygii) are an extremely diverse group of aquatic vertebrates—over half of all living vertebrate species ...
http://animals.about.com/od/bonyfishes/p/bonyfishes.htm
A Guide to Vertebrates and Invertebrates
Jun 21, 2008 ... This single trait places an animal into one of just two groups: the vertebrates or the invertebrates and represents a fundamental division ...
http://animals.about.com/b/2008/06/21/a-guide-to-vertebrates-and-invertebrates.htm
A Guide to Vertebrates and Invertebrates
A Guide to Vertebrates and Invertebrates. ... A Guide to Vertebrates and Invertebrates. Wednesday March 12, 2008. Animal classification is a matter of ...
http://animals.about.com/b/2008/03/12/vertebrates.htm
A Guide to Vertebrates and Invertebrates
A Guide to Vertebrates and Invertebrates. ... This single trait places an animal into one of just two groups: the vertebrates or the invertebrates and ...
http://animals.about.com/b/2007/08/17/wild-friday-an-animals-and-wildlife-quiz-2.htm
The Basics of Vertebrate Evolution
The Basics of Vertebrate Evolution. ... Vertebrates are well-known group animals that include mammals, birds, reptiles, amphibians, and fish. ...
http://animals.about.com/b/2007/08/27/mystery-animal-challenge-photo-clue-number-1.htm
Redefining Amphibians
I've been reading quite a bit recently about the stage in vertebrate evolution when early amphibians first colonized land. It's an intriguing time in ...
http://animals.about.com/b/2008/01/26/redefining-amphibians.htm
Making the Transition from Water to Land
The vertebrates that underwent the evolutionary transition from life in water to life on land faced four basic adaptive challenges. ...
http://animals.about.com/b/2008/01/27/land-to-water.htm
Animal Facts
Ray-Finned Fishes (Actinopterygii) are a diverse group of aquatic vertebrates—over half of all living vertebrate species (aquatic and terrestrial) belong to ...
http://animals.about.com/od/zoologybasics/u/animalfacts.htm
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