Question

questions 1 through 3 refer to the following. the diagram below shows a simplified carbon cycle. 1 mark for review which of the following major storage reservoirs of carbon, stored in the form of carbon dioxide, is not represented in this diagram? a algae b soil bacteria c the moon d the ocean

Explanation:

To solve this, we analyze each option:

• Option A (Algae): Algae perform photosynthesis and respiration, so they are part of the carbon cycle (store/transfer carbon), and could be represented (e.g., similar to the trees shown, as primary producers).
• Option B (Soil bacteria): Soil bacteria act as decomposers (shown in the diagram as "Decomposers"), breaking down organic matter and releasing carbon, so they are represented.
• Option C (The Moon): The Moon has no role in the Earth’s carbon cycle (carbon reservoirs on Earth include atmosphere, biosphere, oceans, soil, etc.—the Moon is not a carbon reservoir here).
• Option D (The ocean): Oceans are major carbon reservoirs (dissolved CO₂, carbonate, etc.), and the diagram might implicitly relate to Earth’s systems where oceans are part of the carbon cycle (even if not drawn, the other options are clearly related to Earth’s carbon cycle, while the Moon is not).

So the Moon is not a major carbon reservoir represented (or relevant) in this Earth - focused carbon cycle diagram.

Answer:

C. The Moon