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What are TWO groups animals have been divided into?
vertebrates and mammals
invertebrates and vertebrates
invertebrates and arthropods
What percentage of animals on Earth are invertebrates?
The largest group of invertebrates are ______
What is one trait of a mollusk?
They have an exoskeleton.
They have soft bodies.
They have eight legs.
Which is NOT a function of a mollusk's muscular foot?
What correctly explains the purpose of the mantle?
It allows the mollusk to feed.
It protects the soft body of the mollusk.
It helps the mollusk move.
What do stinging cells contain?
What is the mouth of the hollow sac surrounded by?