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THE BEST ANIMAL STORIES DELIVERED TO YOUR INBOX. Enjoy timely, meaningful news designed to entertain and educate you about our wild kin, plus updates from National Geographic and The Walt...
Oct 22, 2023 · With thousands more domesticated and wild animal lists planned, our goal is to become the most comprehensive and thoroughly researched animal resource on the planet. Scroll down the page to see a complete list of every animal on A-Z Animals!
Other articles from a-z-animals.com
Animal - Wikipedia. Animals are multicellular, eukaryotic organisms in the biological kingdom Animalia ( / ˌænɪˈmɑːliə / [4] ). With few exceptions, animals consume organic material, breathe oxygen, have myocytes and are able to move, can reproduce sexually, and grow from a hollow sphere of cells, the blastula, during embryonic development.
- Overview
- The animal kingdom
Animals are multicellular eukaryotes whose cells are bound together by collagen. Animals dominate human conceptions of life on Earth because of their size, diversity, abundance, and mobility. The presence of muscles and mobility is one of the primary characteristics of the animal kingdom.
What are the two major groups of animals?
The two major groups of animals are vertebrates and invertebrates. Vertebrates have backbones, and invertebrates do not.
When did animals first appear?
Animals first appeared in the Ediacaran Period, about 635 million to 541 million years ago, as soft-bodied forms that left traces of their bodies in shallow-water sediments.
What are the basic functional systems of animals?
Animals evolved from unicellular eukaryotes. The presence of a nuclear membrane in eukaryotes permits separation of the two phases of protein synthesis: transcription (copying) of deoxyribonucleic acid (DNA) in the nucleus and translation (decoding) of the message into protein in the cytoplasm. Compared to the structure of the bacterial cell, this ...
Explore amazing facts, photos, and videos of your favorite animals with National Geographic Kids. Join the fun and learn more about the natural world.
Animal Pictures and Facts. Learn all you wanted to know about animals with pictures, videos, facts, news, and more. Composite photograph by Joel Sartore, National Geographic Photo Ark.
The most comprehensive guide to animals on the planet. Visit for facts, reports, pictures, information on endangered animals, animals by letter, pets, and more! a-z-animals.com and 1 more link.
