Which of the following are detritivores? 1. Earthworms 2. Jellyfish 3. Millipedes 4. Seahorses 5. Woodlice Select the correct answer using the code given b

1. A. 1, 2 and 4 only
2. B. 2, 3, 4 and 5 only
3. C. 1, 3 and 5 only
4. D. 1, 2, 3, 4 and 5

Answer: C

Explanation

Detritivores are heterotrophs that obtain nutrients by consuming detritus. There are many kinds of invertebrates, vertebrates and plants that carry out coprophagy. By doing so, all these detritivores contribute to decomposition and the nutrient cycles. Examples of detritivores are earthworms, blowflies, millipedes, maggots, and woodlice. Seahorse is considered a secondary consumer. They occupy a middle position in their food chain. Seahorses do not have teeth; they suck in their food and swallow it whole. Thus their prey needs to be very small. Primarily, seahorses feed on plankton, small fish and small crustaceans, such as shrimp and copepods. Fish, jellyfish and crustaceans are common secondary consumer. Hence, option (c) is the correct answer.