Answer:
its Mechanical digestion and Chemical digestion
Explanation:
Because as trials go on scientists discover more information and alter the theories and that is why they are referred to as a "theory" instead of a scientific "law"
Answer:
What do you mean??? Makes no sense.
Answer is polyunsaturated fatty acid residues
Reason
The higher amount of polyunsaturated fatty acids prevents fats from becoming solid in the layer of fat that animals in cold climates use to insulate themselves.