C because fish take many more years to fossilize due to being contained/living in water their bodies are harder to break down
The closest answer to that is milk.
In reality milk has a pH of around 6.5 to 6.7, which makes it slightly acidic. However, some sources cite milk as being neutral since it is so close to the neutral pH of 7.0 and I assume your school wouldn’t pay attention to the specifics
The correct answer is...Once the enzyme binds to the specific substrate molecule, subtle structure changes occur in the active site, which are reverted when the reaction is over.
Hope this helps:)
B) Circulatory.
The Circulatory system spreads the blood all around the heart. It makes sure blood is able to reach every part in the body.