This bacterium derives nutrition by digesting human intestinal contents (in other words, food). humans lacking this bacterium have no measurable reproductive advantage or disadvantage relative to humans who harbor this bacterium. consequently, the bacterium can be properly described as which of the following? 1. symbiont 2. endotoxin 3. mutualist 4. commensal
1 and 2
4 only
2 and 3
2 and 4
1 and 4

What was dr. willem johan kolff’s first step in using the scientific process to invent the hemodialysis machine? he built the machine and tried it with various patients, collecting data about its effectiveness. when a patient’s kidneys failed, he wondered if it would be possible to perform kidney functions with an external machine. he researched and collected data about numerous patients who exhibited symptoms of kidney failure. he drew conclusions from studies of various symptoms of kidney failure, and drew a design for the ideal external blood-processing machine.

What are the characteristics of living things

What is the cause hearing loss in human being