Question

which of the following are true about cnidocytes. (select all that apply.) they have stingers they are in jellyfish and sponges they have stinging organelles they are only found in cnidaria

Explanation:

1. For "They have stingers": Cnidocytes (also called cnidoblasts) contain nematocysts, which are stinging organelles, so they can be considered to have stingers (via the nematocysts). So this is true.
2. For "They are in jellyfish and sponges": Jellyfish are Cnidaria and have cnidocytes, but sponges (Porifera) do not have cnidocytes. So this is false.
3. For "They have stinging organelles": Cnidocytes contain nematocysts, which are stinging organelles. So this is true.
4. For "They are only found in Cnidaria": Cnidocytes are characteristic cells of the phylum Cnidaria, so they are only found in Cnidaria. So this is true.

Answer:

• They have stingers (should be selected)
• They have stinging organelles (should be selected)
• They are only found in Cnidaria (already selected, correct)
• They are in jellyfish and sponges (should not be selected)

So the correct options to select (in addition to the already selected one) are:

• They have stingers
• They have stinging organelles

And confirm "They are only found in Cnidaria" is correct, while "They are in jellyfish and sponges" is incorrect.