Identify which statement describes a scientific law.

a) water freezes at 100°c
b) the universe is expanding.
c) matter cannot be created or destroyed.
d) more crimes take place, during the full moon

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