Abacterium will construct different proteins to metabolize the sugars lactose or glucose, depending on which one it detects in the outside environment. what part of the bacterium allows it to recognize different substances in the outside environment?

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.