Crackers are broken down by digestive substances
Evidence that substances changed (or not)
One way to determine if digestive substances have changed crackers is to measure the pH level of the substance before and after digestion. Digestive enzymes typically lower the pH level of the substance as they break down the crackers into smaller molecules that can be absorbed by the body.
Another way to determine if digestive substances have changed crackers is to use a microscope to examine the size and shape of the cracker particles before and after digestion. If the crackers have been broken down into smaller particles, this would indicate that digestive substances have changed them.
Additionally, chemical tests can be conducted to analyze the composition of the substance before and after digestion. Different chemical reactions can indicate the presence of digestive enzymes and their effects on the crackers.
Overall, a combination of pH measurements, microscopic examinations, and chemical tests can provide evidence of whether digestive substances have changed crackers during digestion.