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# Learning in Roundworms

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Besides the sea snail (Aplysia) and fruit fly (Drosophila melanogaster), the roundworm (Caenorhabditis elegans) is also a widely used invertebrate model for learning and memory research. Usually called C. elegans, this nematode is about 1 mm long and has 302 neurons in its relatively simple nervous system.

Select ALL that are correct about learning in C. elegans.

A

C. elegans can learn to avoid $NaCl$ even though they are naturally attracted to it.

B

C. elegans can learn to avoid smells released by their bacterial food source.

C

C. elegans has temperature preference, which can be modified if that temperature is associated with a starving environment.

D

There are genes and neural circuits behind all these associative learning examples.