Your answer is D. untestable and open to change
Answer: B
Explanation: The DNA in the nucleus can be transcribed in mRNA, which can then leave the nucleus and be translated into proteins, which make up physical traits and characteristics.
Answer:
1) Every planet's orbit is an ellipse with the sun at a focus.
2) A line joining the sun and a planet sweeps out equal areas in equal time(s)
3) The square of a planet's orbital period is proportional to the cube of semi major axis of it's orbit
D. He controlled variables by studying one or two traits at a time
