Replacement is the molecule-by-molecule substitution of another mineral of different composition for the original material. The fine details of shell structures and wood are generally preserved. Minerals which commonly replace hard parts are silica and pyrite
Photosynthesis makes the glucose that is used in cellular respiration to make ATP. The glucose is then turned back into carbon dioxide, which is used in photosynthesis. While water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.
B .... it’s the digestive system
The answer is geological; biological diversity evidence. His hypothesis clarifies that natural assorted qualities come about because of the relatives of nearby or transient ancestors getting to be noticeably adjusted to their differing surroundings. This clarification can be tried by looking at present species and nearby fossils to see whether they have comparable structures, which would show how one is gotten from the other.
