These viruses – known as phages – attach to the surface of bacterial cells, inject their genetic material, and use the cells' enzymes to multiply while destroying their hosts. To defend against a phage attack, bacteria have evolved a variety of immune systems
Answer:
Because flu viruses evolve so quickly, last year's vaccine may not protect you from this year's viruses. New flu vaccines are released every year to keep up with rapidly adapting flu viruses.
Answer:
Amoeba is a unicellular organism
The first answer is right because the resource may take billions of years to replenish and us humans can’t wait that long. A example of a nonrenewable resource is fossil fuel it doesn’t mean it will be forever gone it will just be gone for a looooooooong time
Do you mean "why"?
They are the main source for all living organisms because they provide energy, relatively short term, for any creature that consumes them.
