Please answer this for me

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

Flock x flock y flock z total pieces of food eaten (from previous page) 147 93 60 food percentage* % % % simulated number of birds in flock for 3rd generation** * divide each flock's total pieces of food by 300, the total number of pieces of food eaten. ** multiply the food percentage for each flock by the total number of birds (30).

Gene expression is the activation of a gent that results in a question 1 options: protein dna mitochondria