In 1967 a penicillin-resistant pneumonia, caused by streptococcus pneumoniae and called pneumococcus, surfaced in a remote village in papua, new guinea. at about the same time american military personnel in southeast asia were acquiring penicillin-resistant gonorrhea from prostitutes. by 1976, when the soldiers had come home, they brought the new strain of gonorrhea with them and physicians had to find new drugs to treat it. in 1983 a hospital-acquired intestinal infection caused by the bacterium enterococcus faecium joined the list of bacteria that could not be killed by penicillin. which of these best describes why certain bacteria have become resistant to penicillin?

Dna. we have heard that we are a product of our dna. but where is it? how do we "get" our dna? it is passed to us, from our parents, but in what form? several vocabulary words associated with inheritance are used interchangeably and sometimes, incorrectly. let's see if you can clear this up for someone just learning about inheritance and cell structure.

Set comes up with for examples of sound waves ocean wave light wave and hand wave which of tonys examples is not an actual scientific wave

Imagine a person stepping on a pin and pulling his or her foot away. look at the reflex arc of this scenario below. which statement best describes the image? a)the sensory nerve carries the signal from the effector to the interneuron, and the motor neuron carries the signal to the receptor. b)the motor nerve carries the signal from the receptor to the interneuron, and the sensory neuron carries the signal to the effector. c)the sensory nerve carries the signal from the receptor to the interneuron, and the motor neuron carries the signal to the effector. d)the sensory nerve carries the signal from the receptor to the motor neuron, and the interneuron carries the signal to the effector.