Question

this food web is from an ocean ecosystem in the ross sea, off the coast of antarctica. which arrows show matter moving from a tertiary consumer to a decomposer? select all that apply. the arrow between the emperor penguin and the polychaete worm the arrow between the crabeater seal and the polychaete worm the arrow between the silverfish and the icefish

Explanation:

Step1: Identify tertiary consumers

Tertiary consumers are at a high - trophic level and eat secondary consumers. In this food web, emperor penguin and crabeater seal are tertiary consumers.

Step2: Identify decomposer

Polychaete worm is a decomposer in this context, which breaks down dead organisms.

Step3: Check arrows

We need to find arrows from tertiary consumers (emperor penguin, crabeater seal) to the decomposer (polychaete worm). The arrow between emperor penguin and polychaete worm and the arrow between crabeater seal and polychaete worm meet the requirement. The arrow between silverfish and icefish is between consumers, not from a tertiary consumer to a decomposer.

Answer:

the arrow between the emperor penguin and the polychaete worm, the arrow between the crabeater seal and the polychaete worm