Ascientist has been working for 15 years to develop a new type of plastic material, but she has not yet been successful. which of the following best explains why her work is still a success?

In this experiment, the was intentionally manipulated. it is the independent variable. the dependent variables that were measured were the

According to the cell theory, which describes cells? a. all organisms are composed of multiple cells. b. all cells have the same structure and function. c. cells are found in everything on earth. d. living organisms are not created spontaneously

The pronunciation aid that determines the stress placed upon a syllable is the