A scientist studies the DNA in corresponding genes of a platypus, a beaver, and a duck. The DNA from which two species are most likely to be more similar? Explain your answer

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]