Question

what chemical signal is used by nematodes for locating potential mates? pheromones ammonium acetic acid

Explanation:

Nematodes use pheromones as chemical signals to locate potential mates. Pheromones are chemical substances produced and released by organisms to communicate with others of the same species, often for purposes like mating, defense, or navigation. Ammonium and acetic acid do not serve this specific function for nematode mate location.

Answer:

A. Pheromones