How is the road like cytoplasm??

Cytoplasm is what holds the cell together and it is what nutrients are passed along in a cell. You could compare the nutrients to a car, the cars are passing along the road.

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

thats not a question