Question

In cockroach larval and nymphal characters are maintained by

• A. Ecdysone
• B. Salivary glads
• C. Parotid gland
• D. Juvenile hormone

Answer 1

The correct option is D Juvenile hormone

Juveline hormone is produced by corpora allata in insects. It favours the development of juvenile characteristics during larval life, this hormone predominates and each molt yields another larger juveline and keeps the larva in immature condition or maintains juvenility.

Ecdysone is a steroidal, molting hormone of the prothoracic glands, named 'ecdyson' in insects that triggers metamorphosis.

Salivary glands are the merocrine or epicrine type of gland. Their secretion diffuses out through the cell surface, causing no damage to the cell.

Parotid glands and are the type of salivary glands with a flask - like secretory portion.

So, the correct answer is option D.