Which of the following modes of metabolism is most likely used for an individual that lives in an environment without oxygen, dies when exposed to oxygen, and uses fermentation?
a. obligate anaerobe
b. heterotroph
c. facultative anaerobe
d. photoautotroph

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?