Which of the following would NOT characterize allopatric selection? A
physical barrier within population
B.
extensive gene flow
C.
chromosomal changes within population

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)]

answerclassical conditioning;