Agraduate student finds an organism in a pond and thinks it is a freshwater sponge. a postdoctoral student thinks it looks more like an aquatic fungus. how can they decide whether it is an animal or a fungus?
a) see if it reproduces sexually.
b) determine whether it is unicellular or multicellular.
c) look for cell walls under a microscope.
d) see if it is a eukaryote or prokaryote.

C) Look for cell walls under a microscope.

Explanation:

It can be decided wheter it is an animal or a fungus by looking for cell walls under microscope.

As the animal cells lack cell wall ( outer membrane is just the cell membrane ) while the fungal cells contain a proper cell wall (surrounding their cell membrane )containing chitin.

Hence C) Look for cell walls under a microscope is the right option.

As both the cells reproduce sexually , option A is excluded.

Both the animal and the fungal cells are multicellular , option B is also excluded.

Both of these organisms are eukaryotes , hence option D is also excluded.

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