If the wild type dna sequence reads the cat ate the big rat, what type of mutation would change the sequence to the cat ata eth ebi gra t? missense nonsense insertion deletion silent

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