Ads
related to: AnimalsWith Over 200 Specific Formulas for Pets, Each Option Is Unique Like Your Pet’s Needs. Learn About What Your Cat's Behavior Means and How You Can Support Their Health Needs.
Register or Update Your Pet's Microchip with a Lifetime Registration
Search results
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!
- African Civet
Small animals such as frogs, rodents, lizards, and snakes...
- African Jacana
View all 192 animals that start with A. Share on: How to Add...
- Amazon Tree Boa
Amazon tree boas are widely kept as pets, but surprisingly...
- Amargasaurus
Similar Animals to The Amargasaurus. Other Sauropods related...
- Facts, Pictures and Resources
Types of Animals By Letter: Explore A to Z Animal Lists. See...
- African Civet
Explore the fascinating world of animals with National Geographic, from cockroaches to orcas, from fireflies to sperm whales. Read stories, watch videos, and learn about conservation, science, and culture.
Animals are multicellular, eukaryotic organisms in the biological kingdom Animalia (/ ˌ æ n ɪ ˈ m ɑː l i ə /). 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.
Explore the diversity and wonder of animals with pictures, videos, facts, news, and more from National Geographic. Discover the latest stories, videos, and photos of amphibians, birds, fish, invertebrates, mammals, reptiles, and more.
- 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 ...
Weird But True: Marine Animals. Penguin facts and photos. Penguin facts and photos
