Compare types of models. Which model of the human digestive system is most detailed? A. Photograph of digestive system
B. Dissected pig
C. Artist drawing
D. 2D computer-generated model

1.the evidene of the reaction

2.yes

3.yes

the second type of galaxy is called a barred spiral, which has a thing called a bar straddling the nucleus

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.