After a long vacation you return to find your goldfish has died.Its body is covered in white filaments that are resistant to the fungicide you added to the tank to prevent organisms with cell walls made of chitin from growing.The mystery filaments are likely part of which organism?
A) A dinoflagellate
B) An oomycete
C) A diatom
D) A cellular slime mold
E) A plasmodial slime mold

Question

Quizplus · Accepted Answer

Oomycetes, also known as water molds, have cell walls made of cellulose and glucans which are resistant to many fungicides. Their filamentous structures could explain the appearance of the white filaments on the goldfish's body. The other choices (A, C, D, E) do not have cell walls made of chitin and are therefore unlikely to be the source of the mystery filaments.

After a Long Vacation You Return to Find Your Goldfish