Question

which is the best example of a hypothesis leading to new experimental methods?
gregor mendel influenced the development of the theory that everything is made of cells.
gregor mendel continued the genetic research of thomas hunt morgan, but mendel used pea plants.
thomas hunt morgan continued the genetic research of gregor mendel, but morgan used fruit flies.
the theory that everything is made of cells influenced gregor mendel in his research.

Explanation:

• Gregor Mendel did his research on pea plants. Thomas Hunt Morgan continued the genetic research but used fruit flies. This change in experimental organism (from pea plants to fruit flies) is an example of a hypothesis (related to genetics) leading to new experimental methods (using a different organism).
• The theory that everything is made of cells is the cell theory and not directly related to Mendel's genetics research. Also, Mendel did not continue Morgan's research as Mendel did his work before Morgan.

Answer:

Thomas Hunt Morgan continued the genetic research of Gregor Mendel, but Morgan used fruit flies.