What does virus mean in biology?

Simile for eyes? What are the eight organs of digestion? What is the environment in the intestine? Why does arteriole dilation increase capillary pressure and flow but venous dilation does not? An illness caused by what pathogen must be reported to the regulatory authority? Can cigarette smoking kill more people each year then all the deaths due to aidsheroincrackcocainecar accidentsmurderfireand alcohol combined? What is the terminology for 9 babies born at once? What are diseases that can be caused by the lack of a functional gene for an enzyme? Can you replace air sacs in your lungs? Can tourette's cause compulsive lying? Why are live transplants rare? The form of diabetes that often begins in late childhood and is characterized by inability of the pancreas to make insulin is called? What is absence of symptoms? What are reasons not to smoke in your car? What is a voiding cystograph? When was oil paint first manufactured in the US? A rotator cuff muscle that lies immediately inferior to the infraspinatus? What are the major types of arrhythmia? Why did the saint of pyre look so happy as he was burned? How quick should cancer be treated?