Scelta multipla
Which of the following features is characteristic of the poriferan (sponge) body plan or life history?
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31. Invertebrates
Porifera and Cnidaria
Scelta multipla
The choanocyte of a sponge and the nematocyst of a cnidarian both function in __________.
A
reproduction
B
locomotion
C
locating mates
D
sight
E
obtaining food
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Understand the function of a choanocyte: Choanocytes are specialized cells found in sponges that have a flagellum surrounded by a collar of microvilli. Their primary function is to create a water current and trap food particles, aiding in the sponge's feeding process.
Understand the function of a nematocyst: Nematocysts are specialized organelles found in cnidarians, such as jellyfish and sea anemones. They are used for capturing prey and defense, as they can inject toxins into other organisms.
Identify the common function: Both choanocytes and nematocysts are involved in obtaining food. Choanocytes trap and ingest food particles, while nematocysts capture prey.
Eliminate incorrect options: The functions of reproduction, locomotion, locating mates, and sight do not align with the primary roles of choanocytes and nematocysts.
Conclude the correct answer: Based on the functions of choanocytes and nematocysts, the correct answer is that they both function in obtaining food.
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