What are the characteristics of life

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

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes

Some substances but not other can cross the (blank) membrane of a cell