Types of evidence that darwin used to support his concept of evolution

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

several tissues working together form an organ, and several organs together make up an organisms.

the group of cell that carries out special jobs are tissue.