What is nymph?

What is anaphylaxis? What are the symptoms of it?

How many items moulting occur in Periplanata americana so that nymph grows to reach adult form?

Following are some features of cockroach: I. Number of ovarioles in a female cockroach (Ov) II. The average number of oothecae produced by a female cockroach ( Ot) III. The number of times a nymph of cockroach undergoes moulting (M) IV. The number of gastric caecae present in cockroach (G) The correct arrangement of these in their increasing order is

Following are some features of cockroach: I. Number of ovarioles in a female cockroach (Ov) II. The average number of oothecae produced by a female cockroach ( Ot) III. The number of times a nymph of cockroach undergoes moulting (M) IV. The number of gastric caecae present in cockroach (G) The correct arrangement of these in their increasing order is