What are two reasons that the fossil record is not complete?

Building glycogen from glucose molecules is an example of what

Guinea pig coat color is determined by a single gene. the allele for black coat color is dominant to brown. in a cross between twoblack-haired guinea pigs, 20 offspring are born. if both parents were heterozygous, probability would predict that approximately howmany of the 20 offspring would have brown hair?

The dense layer of connective tissue that surrounds an entire skeletal muscle is the