2) If an 8 mm bead takes 11.8 seconds to settle in the same column, what reason would explain the different settling times of the data?

answer; i believe that the correct answer is(d) nondisjunction during meiosis;

a tetrad is the foursome during meiosis made by two homologous chromosomes that have each already replicated into a pair of sister chromatids.

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)]

what bodys are there orbiting?