Most Multicellular Animals Have an Integument Consisting of a Single

Q31: A rigid exoskeleton is characteristic of<br>A)cnidarians.<br>B)sponges.<br>C)chordates.<br>D)echinoderms.<br>E)arthropods.

Q32: In bony fishes,growth lines in the scales

Q33: The vertebrate skeleton became noticeably strengthened as

Q34: A(n)_ is composed of a core of

Q35: In cartilaginous fishes,the dermis contains bone in

Q37: What is the main component of the

Q38: Which of the following is NOT a

Q39: Ultraviolet rays convert a chemical in the

Q40: In the structure of bone,the minute chambers

Q41: Which term refers to a specialized organelle