Choose all answers that support this definition: An allele that has no observable effect on an organism's appearance if it's paired with a dominant allele.
A dominant
B recessive
c genotype
D phenotype
E R
F r

geologic time scale (for gradpoint) =)

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.