Ascaris and cockroaches resemble each other in
Pseudocoel
Sexual dimorphism
Nephridia
Dorsal tubular nerve cord
Both Ascaris (parasitic roundworm) and cockroaches (insects) exhibit sexual dimorphism which means there are distinct differences between males and females in terms of their physical characteristics and reproductive structures. Sexual dimorphism can include differences in size, shape, coloration, and the presence of specific structures related to reproduction. Hence, the correct answer is option 2.