Question

Statement a. Secretion of colleterial gland forms the egg case in Cockroach
Statement b. The development of Cockroach is hemimetabolous.

• A. Both the statements, a and b, are correct and b is the reason for a
• B. Both the statements, a and b, are correct but b is not the reason for a
• C. Statement a is correct but statement b is wrong
• D. Statement b is correct but statement a is wrong

Answer 1

The correct option is C Statement a is correct but statement b is wrong

The colleterial glands of insects are organs associated with the female genital apparatus. In cockroaches, these glands produce secretions that cover two parallel rows of eggs during oviposition, and in oviparous species, these secretions become the tanned, sculpted, rigid outer casing of the ootheca.

Hemimetabolous or incomplete metamorphosis: The insects which attain adult forms by gradual morphological change with succes­sive moults are called incomplete metamor­phosis or hemimetabolous development. This type of metamorphosis is seen in insects like butterflies, moths, beetles, ants, etc.

So, the first statement that the secretion of colleterial gland forms the egg case in Cockroach is correct while the second statement saying The development of Cockroach is hemimetabolous is incorrect and the first and the second statements are not related to each other.

Hence, the correct option is 'C'.