In biology, a trait that arose in an ancestor and is passed along to its descendants is referred to as a
a) derived character
b) taxonomic group
c) molecular clock
d) physical similarity

this is math not biology xd

imagine a line passing through the center of earth that goes through both the north pole and the south pole. this imaginary line is called an axis. earth spins around its axis, just as a top spins around its spindle. this spinning movement is called earth's rotation. at the same time that the earth spins on its axis, it also orbits, or revolves around the sun. this movement is called revolution.

answer: b

coz red blood cells marrow and circulates the body for 120 days.