I think that the best phrase to fit into the blank is a "scientific theory".
A scientific theory is developed through experiments which use the scientific method, and a theory can be improved if additional data is available or if people provide suggestions which make the theory fit the data better.
Answer:
I think its c Scientists cannot determine how it changes.
d). It increases over time.
Answer:
Sedimentary rocks
Explanation: Where are fossils found? Fossils are found almost exclusively in sedimentary rocks—rocks that form when sand, silt, mud, and organic material settle out of water or air to form layers that are then compacted into rock. So the answer will be <em>Sedimentary</em> rocks.
I do not believe so because it is genetic, just you can't forever change a feature without plastic surgery or an accident, etc.
An organism that contains foreign DNA, which was inserted into its own genetic material, is called transgenic.
