A. How does this relate to adaptations and fitness for different environments?
5. Read the four observations listed earlier. How does the antibiotic resistance of the bacteria that
cause tuberculosis (TB) and methicillin-resistant Staphylococcus aureus (MRSA) demonstrate
natural selection based on each of those four observations?

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.

this is more of a statement than a question. is there answers to go along with this, or is it opinion based?

the answer is c because it is most logical.

answer an inhibitory neurotransmitter in the brain;