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Sponges and cnidarians worksheet

Sponges and cnidarians worksheet 2025

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The document is a worksheet focused on sponges and cnidarians, detailing their characteristics, habitats, structures, reproduction methods, defense mechanisms, human uses, and threats to their survival. It covers the phylum Porifera for sponges and the phylum Cnidaria for jellyfish, corals, hydras, and sea anemones. Key topics include sponge anatomy, types of sponges, cnidarian diversity and body plans, as well as specific features like nematocysts in cnidarians.

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What are the facts about sponges and cnidarians?

Like sponges, cnidarians are believed to be one of the first multicellular forms of life on Earth. There are more than 9,000 species of cnidarians, and they have different structures, aquatic habitats, and ways of acquiring food. However, most cnidarians, like their friends the sponges, feed on microorganisms.

What are 5 facts about cnidarians?

Facts about cnidarian The phylum cnidaria is invertebrates, and their size ranges from of an inch to 61/2 feet in diameter. These can grow to a length of 250 feet. The weight of the species can be around 440 pounds. The lifespan of Cnidaria is around 4000 years, and these live on a carnivore diet.

What do sponges and cnidarians have in common?

Like the sponges, Cnidarian cells exchange oxygen, carbon dioxide, and nitrogenous wastes by diffusion between cells in the epidermis and gastrodermis with water.

What are 5 facts about sponges?

A sponge is a member of the phylum Porifera. It is a simple animal with many cells, but no mouth, muscles, heart or brain. It is sessile: it cannot move from place to place the way most other animals can. A sponge is an animal that grows in one spot like most plants do.

What are the differences between sponges and cnidarians?

Sponges have multiple cell types that are geared toward executing various metabolic functions. Cnidarians have outer and inner tissue layers sandwiching a noncellular mesoglea. Cnidarians possess a well-formed digestive system and carry out extracellular digestion.

What do sponges and cnidarians eat?

Feeding and digestion The Porifera are primarily filter feeders, utilizing food particles suspended in the water and captured by the choanocytes. Food particles consist essentially of bacteria, other microorganisms, and particles of organic debris; sponges also probably absorb dissolved organic substances.

What do sponges and cnidarians have in common group of answer choices?

What do sponges and cnidarians have in common? Like sponges, cnidarians have an outer layer of cells and an inner layer of cells separated by a jelly-like layer. Each of these layers of cells is an epithelium and they are separated by a mesoglea.

Sponges and cnidarians worksheet 2025

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