Markhira enjoys visiting her grandmother. Lately Markhira and her grandmother have been baking various desserts. Markhira's favorite is chocolate chip cookies. Every time they bake them, Markhira's stomach growls until she has a chance to eat one. After several weeks of visiting her grandmother and baking cookies, Markhira notices that her stomach growls every time she decides to go to her grandmother's house. The growling of Markhira's stomach at the thought of visiting her grandmother is caused by:

hunger

Explanation:

well since twins have about the same dna they dont have one think in common which is the figer print. nobodys fingerprint is the same. if your using twin you would most likely get around the same results for both of them because of the genetics.. i hope this

i believe the answer is:   psychological  experiment

in this experiment, wilhelm wundt became the first person that implement scientific method in analyzing the pyschological phenomenon.

due to this result, wilhelm wundt also able to make psychology to be acknowledged as a separate scientific field from biology.