Why are virus considered non-living?
Viruses don't need nutrients/food and do not reproduce on their own. They need a host cell.
If virus is non-living, how do they spread?
Viruses hijack cells to make copies of themselves and then burst out of the cell. The copies infect other cells.
Where can you find bacteria?
Soil,skin, poop,cheeze,yogurt
How do bacteria make more of themselves?
They reproduce.
White blood cell
cell in our human body that fight infection
How does the size of a bacterial cell compare with a virus?
bacteria is a giant for the virus.
Can bacteria be both harmful and helpful?
yes, good bacteria in cheese,yogurt,soil helps plant grow and in our intestine.
bad bacteria make us sick.
Virus spreads all over the body.
True or False
True
Why don's doctors give antibiotics for viral infection?
Antibiotics only kill bacteria ,they do not work on virus.
How do vaccines work?
lock and key system.
once the white-blood cells find the right key ,they keep producing more and more keys.
they never lose the key once they make it.