Carlos learns that all living things have cells with the same system of genetic material. Scientists have concluded that this shows that all living things had a common ancestor. Carlos finds this difficult to understand as he looks at pictures of a dog and snake. He cannot see many similarities between them, but what shows evidence of their common evolutionary past?

A. DNA
B. gene transfer
C. natural selection
D. endosymbiosis

Robert was not waiting for her in the little parlor. he was nowhere at hand. the house was empty. but he had scrawled on a piece of paper that lay in the lamplight: "i love you. good-by—because i love you." what significant idea, presented throughout the novel, does robert's final departure and note highlight? edna is ultimately alone in her rebirth. edna needs to find solace in her children. edna will never be truly loved by anyone. edna should not have forsaken her family.