(18pts)
penicillin is a drug that kills bacteria today many bacteria are resistant to disease how does natural selection best explain this observation?

a) penicillin causes some bacteria to mutate
b) some bacteria survive penicillin and reproduce.
c)resistant bacteria cannot be attacked by penicillin
d) resistant bacteria mutate more quickly than normal bacteria
explain your answer, !

The answer is C)Resistant bacteria cannot be attacked by penicillin

both anaerobic and aerobic respiration use glucose (or other carbohydrates), proteins and lipids to produce atp and nadh. cell uses those energy molecules, obtained from food and   breaks them down during the chemical reactions of respiration. in anaerobic respiration, nadh is regenerated to nad+ by enzymes lactate dehydrogenase (lactate is produced, e.g. in muscle cells) or by alcohol dehydrogenase where ethanol is produced (alcohol fermentation), while in aerobic respiration, electrons from nadh are deposited in the mitochondria to regenerate nad+ (electron transport chain. anaerobic respiration produces 2 atp per molecule of glucose compared to aerobic respiration where about 38 atp molecules are produced.

i believe the answer is snake.