Dana Miles-Evans
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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
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- Animal Pictures and Facts
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- Animals
Oct 22, 2023 · You will find all of our animals below. From Aardvark to Zorse we are building the most comprehensive body of animal names on the web! Animals that start with A
Animals are unique in having the ball of cells of the early embryo (1) develop into a hollow ball or blastula (2). Animals have several characteristics that set them apart from other living things. Animals are eukaryotic and multicellular.
Explore amazing facts, photos, and videos of your favorite animals with National Geographic Kids. Join the fun and learn more about the natural world.
- 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 ...
Learn about any animal using the search box or browse by type, continent, or name. Discover the wonders of the natural world with facts, pictures, definitions, and more on A-Z Animals.
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.
