HELP PLEASE Which of the following questions could be answered through a scientific investigation?

I. What type of antibacterial soap kills the most bacteria?

II. What type of food do dogs think tastes the best?

III. Does the color pattern of a butterfly affect its chance of survival?

IV. Do cats feel sad when they are alone?

A. I and IV only
B. I and III only
C. I, II, III, and IV
D. II and III only​

Many farmers prefer cattle without horns because it is safer for their herds. the allele for no horns (n) is dominant to the allele for the presence of horns (n). a farmer mates a male with horns to a heterozygous female without horns. what is the chance that the offspring will have horns?

Construct at least two possible hypotheses for the student’s experiment.

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 !