Which of the following is not a filter feeder?

Unio
Amphioxus
Herdmania
Asterias

LohaHridoy

4 views

2025-01-04 04:42

1 Answers

AhmedNazir

Option 4 : Asterias

The correct answer is Asterias.

Concept:

Filter feeders are feeding animals that extract suspended matter and food particles from water by passing it through a specialized filtering structure (gills).
Filter feeding is the characteristic feature of certain animals known as filter feeders.
Some animals like Unio, sponges, Amphioxus, Herdmania and many fishes use this feature.

Explanation:

Unio-
- Unio belongs to the phylum Mollusca.
- Molluscs are filter feeders, and their gill plates trap phytoplanktons.
- Water enters the mantle cavity through an opening and rises through the gills to the suprabranchial chamber.
Amphioxus-
- Amphioxus belongs to the phylum Chordata and subphylum Cephalochordata.
- In Amphioxus slits are modified to form gills, that extracts food particles from the water in which the animals live.
Herdmania-
- Herdmania belongs to the phylum Chordata and subphylum Urochordata.
- Herdmania is a filter-feeding tunicate that lives in marine environments.
Asterias-
- Asterias belongs to the phylum Echinodermata.
- In Asterias specialized filtering structures (gills) are absent.
- So, Asterias is not a filter-feeder.

4 views Answered 2022-09-04 04:29

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