What do echinoderms and chordates have in common?

A. Protostome development
B. Endoskeletons
C. Ecdysis
D. Dorsal nerve cords


Answer: B

Biology & Microbiology

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Indicate whether the statement is true or false

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Which of the following can be found in the mesohyl of a sponge? 1. amoebocytes 2. spicules 3. spongin 4. zygotes 5. choanocytes

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