What is the main component of the arthropod cuticle?
A) actin
B) myosin
C) keratin
D) chitin
E) collagen
Correct Answer:
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Q14: The outer layer of the mammalian epidermis
Q15: The three main components of most connective
Q16: Arrector pili muscles in human skin
A)initiate shivering.
B)close
Q17: In the structure of bone,the minute chambers
Q18: Most multicellular animals have an integument consisting
Q20: A rigid exoskeleton is characteristic of
A)cnidarians.
B)sponges.
C)chordates.
D)echinoderms.
E)arthropods.
Q21: Skeletal muscles are attached to the skeleton
Q22: In bony fishes,growth lines in the scales
Q23: The feathers of birds are derived from
Q24: In the epidermis of hagfishes are _,which
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