Sponges and cnidarians worksheet 2025

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  1. Click ‘Get Form’ to open the sponges and cnidarians worksheet in the editor.
  2. Begin by filling out the 'Sponge Basics' section. Answer questions about sponges, such as their habitat and structure. Use the text box provided for detailed responses.
  3. Move on to the 'Sponge Reproduction' section. Here, describe the reproduction process using terms like hermaphroditic and gamete. Ensure clarity in your explanations.
  4. In the 'Cnidarian Basics' section, answer questions regarding Cnidarians' adaptations and classifications. Utilize bullet points for clear organization.
  5. For drawing tasks, use the drawing tool available in our editor to create diagrams of sponges and nematocysts, ensuring all labels are clear.
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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.
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.
Like the sponges, Cnidarian cells exchange oxygen, carbon dioxide, and nitrogenous wastes by diffusion between cells in the epidermis and gastrodermis with water.
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.
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.

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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? 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.

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