Which characteristic of life is most directly supported by the function of the digestive system in animals?

• A. Obtaining and using energy through metabolism
• B. Responding to environmental stimuli
• C. Maintaining genetic information
• D. Reproducing to create offspring

Answer: (A)

Verified step by step guidance

1. Understand the role of the digestive system: The digestive system in animals is responsible for breaking down food into smaller molecules, such as glucose, amino acids, and fatty acids, which can be absorbed and used by the body.
2. Relate the digestive system to the characteristics of life: One of the key characteristics of life is the ability to obtain and use energy through metabolism. Metabolism refers to the chemical processes that occur within a living organism to maintain life, including breaking down nutrients for energy.
3. Analyze the options: The first option, 'Obtaining and using energy through metabolism,' directly relates to the function of the digestive system, as it provides the nutrients needed for metabolic processes. The other options, such as 'Responding to environmental stimuli,' 'Maintaining genetic information,' and 'Reproducing to create offspring,' are important characteristics of life but are not directly supported by the digestive system's function.
4. Connect the digestive system to metabolism: The nutrients absorbed by the digestive system are used in cellular respiration, a metabolic process that generates ATP (adenosine triphosphate), the energy currency of the cell. This energy is essential for various biological activities.
5. Conclude the reasoning: Based on the analysis, the characteristic of life most directly supported by the digestive system is 'Obtaining and using energy through metabolism,' as it enables the organism to acquire and utilize energy for survival and growth.