These are cells where the genetic material is contained in membrane-bound nuclei. example: animal cells

i believe it would cause an increase of percipitation, though i could be wrong. so i would say b is the 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)]