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Which of the following is thought to be the most closely related to the common animal ancestor?

Which of the following is NOT a feature of organisms classified in the phylum Echinodermata?

Insects (e.g. grasshoppers) belong to the phylum _______.

Which image above represents the germ structure of triploblasts, such as that found in all bilaterally symmetrical animals?

Insects (e.g. grasshoppers) belong to the phylum _______.

Which of the following is NOT a feature of organisms classified in the phylum Annelida?

A flying fox (large, fruit-eating bat) bears live babies. This animal is classified as _______.

Christmas tree worms (marine) belong to the phylum _______.

Spiders and scorpions belong to the phylum _______.

In the image above B demonstrates _______ symmetry.