If two cities on a map or 4 cm apart on a scale on the map is 2 cm 500 miles how far apart are the two cities on earth

answer; ///i do believe the answer is (virus);

the answer is sex-linked recessive.

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.