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
A) 1 and 2 B) 2, 3, 4 C) 1, 2, 3, and 4 D) 1, 2, 3, 4, and 5
Biology & Microbiology