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Question

Identify a member of Porifera.


A

Spongilla

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B

Euglena

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C

Penicillium

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D

Hydra

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Solution

The correct option is A

Spongilla


The correct option is A.

Explanation of the correct option:

  1. Spongilla is a freshwater sponge genus in the Spongillidae family that lives in lakes and sluggish streams.
  2. Sponges are sessile metazoans that belong to the phylum Porifera.
  3. They are multicellular but have unspecialized cells that can convert into other kinds and frequently move between the main cell layers and the mesohyl.

Explanation of the incorrect option:

Option B:

  1. Euglena is a Protist genus with unicellular flagellated cells.
  2. Euglena is a genus of euglenoid plants.
  3. Euglena has plastids and uses photosynthesis in the light, but at night it uses its flagellum to move around in search of food.

Option C:

  1. Penicillium is an Ascomycete genus (fungi).
  2. They are commonly referred to as blue or green mold.
  3. They are economically significant in the production of cheese, organic acids, and antibiotics.
  4. They play an important role in the decomposition of the ecosystem.

Option D:

  1. Hydra is a phylum Cnidaria genus of tiny, simple, radially symmetrical freshwater creatures.
  2. They have small, tube-shaped bodies with several tentacles on one end.
  3. Hydra is an organism with two embryonic or tissue layers known as the ectoderm and endoderm.
  4. When a central axis passes through the body of Hydra, it can be divided into two identical halves, exhibiting radial symmetry.

Final answer: Spongilla is a member of Porifera.


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