Which of the two parts in cockroach are fundamentally similar in structure?

Which of the following two parts in cockroach are fundamentally similar in structure

Which part in cockroach is fundamentally analogous to nostrils of man:

Which part in cockroach is fundamentally analogous to nostrils of man:

Fundamental similarity in structure in Periplaneta

Which mouth part of cockroach acts as upper lip?

Which type of mouth parts are found in cockroach?

Trachea of cockroach and mammal are similar in having

Two animals A and B have similar morphological features and are fundamentally similar with each other, they must be treated as

Two animals A and B have similar morphological features and are fundamentally similar with each other, they must be treated as