External - Exoskeleton .
Internal.
internal
An invertebrate is an animal without an internal skeleton. Ants do not have an internal skeleton so they are invertebrates by definition.
EXTERNAL
Ants
internal
By definition, arthropod skeletons are external, a defining characteristic of the phylum; having both an internal and external skeleton would be redundant.
Arthropods use external skeletons (exoskeletons).
No beetles have an exoskeleton or external skeleton not an internal skeleton (bones).
Yes.
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The external conflict would be that Leiningen chooses to stay and fight off the ants.