Porifera & Cnidaria

Front

What are Porifera?

Back

Porifera, commonly known as sponges, are simple aquatic animals characterized by their porous bodies and lack of true tissues and organs.

Front

What is the primary habitat of Porifera?

Back

Porifera are primarily found in marine environments, although some species inhabit freshwater.

Front

What is the body structure of Porifera?

Back

Porifera have a unique body structure with a porous body wall, consisting of an outer layer of cells, an inner layer of choanocytes, and a mesohyl in between.

Front

How do Porifera obtain food?

Back

Porifera are filter feeders; they draw water through their pores, trapping food particles with their choanocytes.

Front

What is the significance of the term 'sessile' in relation to Porifera?

Back

Sessile means that Porifera are fixed in one place and do not move; they are attached to a substrate.

Front

What are Cnidaria?

Back

Cnidaria are a phylum of animals that include jellyfish, corals, and sea anemones, characterized by the presence of cnidocytes, which contain stinging cells.

Front

What is a key feature of Cnidaria?

Back

A key feature of Cnidaria is their radial symmetry, which allows them to interact with their environment from all sides.

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What are nematocysts?

Back

Nematocysts are specialized stinging organelles found in Cnidaria that are used for capturing prey and defense.

Front

How do Cnidaria capture prey?

Back

Cnidaria use their nematocysts to sting and immobilize prey, which is then brought to their mouth.

Front

What is the life cycle of a jellyfish?

Back

The life cycle of a jellyfish includes a polyp stage and a medusa stage, with reproduction occurring both sexually and asexually.