Yes it can be studied by the scientific method because it is testable and observable.
Answer:
1
Explanation:
Mostly because it was the BIGGEST thing that really happend during said event. The others happend yes but not as majorly as number 1.
External parts of the pig
Answer:
Powerhouse of the cell, creates ATP (energy for the cell).
Explanation:
Answer: They do this to obtain the vital nitrogen that they need to grow.
Explanation: