Which two of the following arrows show matter moving from a tertiary consumer to a decomposer?
1. the arrow between the orca and the sea cucumber
2. the arrow between the kelp and the kelp bass
3. the arrow between the kelp and the sea urchin
4. the arrow between the black rockfish and the kelp bass
5. the arrow between the kelp bass and the bat star
3. the arrow between the kelp and the sea urchin, 5. the arrow between the kelp bass and the bat star.
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To determine which two arrows show matter moving from a tertiary consumer to a decomposer, we need to understand the roles of each organism in the food chain.
Tertiary consumers are organisms that feed on secondary consumers, which in turn feed on primary consumers. Decomposers, on the other hand, break down organic matter and recycle nutrients in the ecosystem.
Let's analyze each arrow:
1. The arrow between the orca and the sea cucumber:
- The orca is a tertiary consumer.
- The sea cucumber is a decomposer.
- This arrow shows matter moving from a tertiary consumer to a decomposer.
2. The arrow between the kelp and the kelp bass:
- The kelp is a primary producer.
- The kelp bass is a secondary consumer.
- This arrow does not show matter moving from a tertiary consumer to a decomposer.
3. The arrow between the kelp and the sea urchin:
- The kelp is a primary producer.
- The sea urchin is a primary consumer.
- This arrow does not show matter moving from a tertiary consumer to a decomposer.
4. The arrow between the black rockfish and the kelp bass:
- The black rockfish is a primary consumer.
- The kelp bass is a secondary consumer.
- This arrow does not involve a tertiary consumer or a decomposer.
5. The arrow between the kelp bass and the bat star:
- Both the kelp bass and the bat star are secondary consumers.
- This arrow does not involve a tertiary consumer or a decomposer.
Based on the analysis, only one arrow shows matter moving from a tertiary consumer to a decomposer, which is the arrow between the orca and the sea cucumber (choice 1).