Some organisms that live in the intestines of cows do not require oxygen to survive. Which the following best identifies the process by which these organisms obtain energy?
A. aerobic respiration
B. anaerobic respiration
C. diffusion
D. osmosis

haploid cells;

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.