Cells with the same structures and functions work together to form a. systems. b. tissues. c. organs. d. organisms.

B, they work together to form a tissue, hope this helps, have a great day.

B. tissues.

cells make up tissues, tissues make up organs, organs make up organ systems and organ systems make up an organism.

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