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n terms of food capture, which sponge cell is most similar to the cnidocyte of acnidarian?a) amoebocyteb) choanocytec) epidermal celld) pore ce

Question

In terms of food capture, which sponge cell is most similar to the cnidocyte of a cnidarian?

a) amoebocyte
b) choanocyte
c) epidermal cell
d) pore cell

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Solution

The sponge cell that is most similar to the cnidocyte of a cnidarian in terms of food capture is the choanocyte.

Here's why:

  1. Sponges are simple multicellular organisms that primarily rely on water flow through their bodies for many of their life processes, including feeding.

  2. The choanocytes, also known as collar cells, line the interior of the sponge. They have a sticky, funnel-shaped collar and a whip-like flagellum.

  3. The movement of the flagellum creates a water current which forces water and food particles into the sponge. The food particles then stick to the collar of the choanocyte.

  4. The choanocyte engulfs the food particles by phagocytosis, which is similar to how a cnidocyte in a cnidarian captures food.

  5. Cnidarians, like jellyfish and sea anemones, have specialized cells called cnidocytes that contain a barbed or venomous coiled thread, which can be quickly ejected to capture prey or defend against predators.

  6. Therefore, in terms of food capture, choanocytes in sponges are most similar to cnidocytes in cnidarians.

The other cells listed - amoebocytes, epidermal cells, and pore cells - do not have the same function in food capture as cnidocytes.

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