Which of these statements best describes a scientific theory? it is a description of an observation which does not change over time. it is a description of an observation after research over a period of time. it is an explanation for an observation which is not based on data. it is an explanation for an observation after several valid experiments?

The correct answer is- It is an explanation for an observation after several valid experiments.

A scientific theory can be described as an explanation of a fact that can be tested and verified with the help of repeated experiments, using particular protocol of experiment that involves measurement, and evaluation of results.

In other words, It is the interpretation and explanation of the facts that are observed through various experiments.

Thus, it is an explanation for an observation after several valid experiments.

answers are:

lysogenic     viral dna merges with host cell dna

lysogenic     no symptoms

lytic               viral dna takes over

lysogenic     virus does not destroy host cell

lytic               virus destroys host cell

lytic               induces symptoms of viral infection

lysogenic       cell reproduces and spreads provirus