The pilomotor reflex is part of what larger process? A. Fluid homeostasis
B. Positive feedback
C. The fight-or-flight response
D. The hypothalamus

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands

where is the scientific experiment?