Scientific theories are explanations for scientific phenomena that can be changed when and if new information is found to support or refute the explanation. which of the following statements provides an example of a scientific theory? a. an object at rest will remain at rest unless acted on by an outside force. b. species evolve by passing on advantageous hereditary traits. c. for every action there is an equal and opposite reaction. d. in a closed system, energy is neither created nor destroyed.

Pepsin is an enzyme in the stomach that breaks polypeptides into amino acids. pepsin functions best at a ph of around 1.5. what would be the most likely result if the ph of the stomach were increased to 5

If t=tall and t=short what will be the physical appearance of the offspring the cross below? a. some will be tall and some will be short b. they will all be tall c. they will all be short d. they will be medium height

Scientists are conducting a study on the effectiveness of a new drug on memory loss. they are giving some of the test subjects the new drug to find out if it improves their long-term memory. which are possible limitations of this study? check all that apply. a) test subjects may want to participate in additional experiments. b) test subjects may think they should be paid more. c) test subjects may get bored and want to quit early. d) test subjects may have to travel during the experiment. e) test subjects may have full-time jobs. this is multiple choice. you for the !