Question

A theory is constantly subject to testing, modification, and may even be refuted as new evidence and ideas emerge. Which of the following is a popular theory that is studied extensively in marine science?
Conservation of energy
Conservation of mass
Evolutionary theory
Gravity

i think it is Evolutionary Theory

Answer 1

Yes indeed you are right that even up until now, the theory that is always challenged is the Evolutionary theory. Since the living things' species in the world is so diverse and very mysterious that though some answers maybe discovered, new questions will soon follow and will challenged the already accepted answer.

Answer 2

Answer:

I'm pretty sure it's C.  Evolutionary Theory