Which statement is true about the scientific method

How can scientists test their ideas about the origin of the universe if they can't physically interact with or study?

This group of organisms perform the process of ammonifcation. a. herbivores b. decomposers c. carnivores c. plants

As the pea seeds respire, the level of coloured liquid in the left hand part of the capillary tube rises. by referring to what is happening in the apparatus, explain why the level of liquid changes