Why is the amniotic egg considered an important evolutionary breakthrough?

Which situation is an example of not doing work? lifting a couch throwing a baseball running up stairs carrying a box

Urgent in guinea pigs, black fur (b) is dominant over white fur (b). cross a heterozygous (hybrid) black guinea pig with a homozygous (purebred) white guinea pig. complete a punnett square, identify the genotype(s), phenotype(s), and probability (% and fraction) that the offspring will be black and white?

Which step is the same in both forms of fermentation, as well as in cellular respiration?