Three days after an organism eats some meat, many of the organic molecules originally contained in the meat would be found in newly formed molecules of

Correct Answer: B

Rationale: Meat's proteins are digested into amino acids, which are absorbed and used to synthesize new proteins in the organism's cells within days. Glucose and starch are carbohydrate-based. Oxygen is inorganic.

Correct Answer: D

Rationale: Assuming the diagram shows starch (common in such tests), salivary glands produce amylase to digest it, making D correct; the others do not primarily digest carbohydrates.

Correct Answer: C

Rationale: Faster peristalsis reduces time for nutrient absorption, like amino acids, making C correct.

Correct Answer: D

Rationale: Bacteria in the large intestine produce vitamins like K, making D correct.

Correct Answer: C

Rationale: Assuming X connects mouth to stomach, it's the esophagus, making C correct.