Blood enters the pulmonary vein with close to of the binding sites for oxygen saturated.

What is the answer for the complicated molecules that make up living things usually contain carbon. why is carbon so important in these molecules?

One gene can influence trait(s). one trait can be determined by gene(s).

Cattle with brown fur and cattle with white fur will produce a reddish roan calf . when examined closely, the calf show about an even number of brown hairs and white hairs that give a reddish appearance when viewed from far away. the fact that both the brown fur allele and the white fur allele are expressed equally in the offspring is an example of