<span>Virues are different from bacteria, fungi and parasites, beacuse they can not survive without the presence of a host organism.They need a host to reside into, replicate, obtain nutrition and thrive. Outside host, they are just present as proteins or capsids. </span>
The population of fish would slowly begin to die out as the deeper the water the less dissolved gasses there are.
Answer:
Testing only one Variable at a time lets you analyze the results of your experiment to see how much a single change affected the result. If you're testing two Variables at a time you won't be able to tell which Variable was responsible for the result.
Explanation: