Question

5 multiple choice 10 points students in a class measured the mass of various living organisms. they then kept the organisms in the dark for 24 hours before remeasuring them. none of the organisms were provided with nutrients during the 24 - hour period. the data are as follows. which of the following is the best explanation for the pattern of change in mass of the organisms over time? cellular respiration water loss due to evaporation growth and reproduction the law of conservation of matter

Explanation:

Cellular respiration is a metabolic process that breaks down organic molecules (such as glucose) to release energy. In the absence of light (for the plant, which can't perform photosynthesis to make new organic matter) and no nutrients provided, organisms rely on cellular respiration. This process consumes stored organic compounds (which contribute to mass) and converts them into carbon dioxide, water, and energy. The carbon dioxide is released into the environment, leading to a decrease in mass.
Water loss due to evaporation is less likely as the organisms (especially the submerged plant and sea anemone in a presumably controlled aquatic - like setup for measurement) are not in a high - evaporation - prone environment described. Growth and reproduction would require an input of materials (nutrients) which are not provided. The law of conservation of matter is a principle, but it doesn't explain the mass decrease pattern here as it's more about matter not being created or destroyed in a closed system, but the organisms are an open system (losing carbon dioxide to the environment).

Answer:

Cellular respiration