C. Common house spiders need to eat insects to live.
<h3><u>Explanation;</u></h3>
<em><u>A hypothesis is a tentative prediction or explanation of the relationship between two or more variables.</u></em>
<em><u>A testable hypothesis is a hypothesis that can be proved or disproved as a result of testing, data collection, or experience. </u></em>
A testable hypothesis must be a relational statement between two or more variable. It should include phrases such as "more than", "less than", "greater than", "different from", or "related to". It also must be justifiable that is consistent with an existing body of research findings.
By doing a test cross of albinism and sickle cell anemia you'll see that the probability that one child is unaffected by either conditions will be 9/16. Both children would be 9/16 * 9/16.
Since fraternal twins are developed from two separate fertilization events the probability chance will be independent.