Extensively tested and generally accepted : educated guess that has yet to be tested a) hypothesis : theory b) theory : hypothesis c) observation : theory d) observation : hypothesis

The correct answer would be B) theory: hypothesis.

A hypothesis refers to the proposed or tentative explanation of any physical or natural process.

It usually provides the first step of any research or experiment.

It is highly testable as it is tested with the help of a number of scientific experiments and observations et cetera.

In contrast, a scientific theory is a well-proven explanation of aspects of the natural world. It is based on facts which have been confirmed through experiments and observation.

in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation:

if you know your abc's you should be able to get your answer or just use google