Evidence suggests that there is a relationship between ancient dinosaurs and modern birds. Through time, each occurrence of a new trait most likely resulted from which of the following?
A B C D
mutation of genes hybridization of species extinction of populations alteration of the environment
Question: Evidence suggests that there is a relationship between ancient dinosaurs and modern birds. Through time, each occurrence of a new trait most likely resulted from which of the following?
(A) mutation of genes
(B) hybridization of species
(C) extinction of populations
(D) alteration of the environment

Answer: (A) mutation of genes
Answer: (C) extinction of populations
Question: Evidence suggests that there is a relationship between ancient dinosaurs and modern birds. Through time, each occurrence of a new trait most likely resulted from which of the following?
(A) mutation of genes
(B) hybridization of species
(C) extinction of populations
(D) alteration of the environment
Answer: (A) mutation of genes