Animals usually reproduce by ___.
Animals cells are surrounded by ___.
All animals are ___.
An animal with a skull and a backbone is a(n) ___.
When an egg and a sperm come together, they form a(n) ___.
All animals are ___ and have eukaryotic cells.
A collection of similar cells is known as a(n) ___.
All animals are ___.
Most animals have ___, which combinations of two or more tissues.
Beetles, ants, bee, wasps, moths, and butterflies represent about ___ of all known animal species.
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