Question

In cockroach, the ootheca is formed by the secretion of
A. Phallic gland
B. Colleterial gland
C. Mushroom gland
D. Conglobate gland

Answer 1

Hint: Cockroach is the invertebrate organism which is an insect that belongs to the phylum Arthropoda, which is the largest known phylum of the animal kingdom. Cockroaches are omnivorous organisms. It breathes through the tracheae.

Complete answer:
Ootheca is the egg mass which is covered by some kind of layer, ootheca is composed of protein that hardens around the eggs and provides protection against microbes, parasites, predators, and weather. In cockroaches, the ootheca is secreted by a colleterial gland that opens into the vestibulum and secretes the protein and tanning agent. The posterior and anterior section of cockroach secretes a structural protein that produces material used in the formation of ootheca.
-The phallic gland is the male reproductive part of the cockroach, which appears as a large club-shaped present just below the ejaculatory duct. The phallic gland secretes an outer layer of the spermatophore. This gland is also called the Conglobate gland, this is open by side of the male gonopore.
-Mushroom gland is also part of male reproductive organs that are located in the 6th and 7th abdominal segments. It acts as a large accessory gland which is whitish, it has two types of tubules named peripheral tubules or Utriculi majores which form an inner layer of the spermatophore, and the second is utriculibreviores which nourishes the sperms. Apart from some bulbous and short tubules are present from seminal vesicles which are filled with sperms.
-Conglobate gland:- It is another name of the phallic gland of the male reproductive organ.

Hence the correct option is B.

Note: Ootheca are most probably found in cockroaches and praying mantis and subfamilies of Coleoptera. Ootheca helps to maintain the balance of water via surface variations, it is porous in dry climate to prevent desiccation and smooth in wet climate to prevent oversaturation.