Word Count : 448

---

In insects, moulting and metamorphosis are critical developmental processes regulated by a complex interplay of hormones. These hormones control the timing of shedding the exoskeleton, tissue differentiation, and the transformation from one developmental stage to another, ensuring proper growth and survival. The primary hormones involved in these processes are ecdysone, juvenile hormone (JH), and prothoracicotropic hormone (PTTH), each having a distinct role in insect physiology. Ecdysone, a steroid hormone secreted by the prothoracic glands, is central to initiating moulting. Its secretion is triggered by PTTH, which is released from the brain in response to environmental cues like photoperiod and temperature. Ecdysone stimulates the epidermal cells to synthesize a new cuticle beneath the __________ _____ ________ ___ ________.
__________ ________ _________ _______ ________ _______ __________ ____ _________ ________ __________ _______.
__________ _________ _____ ____ ________ ________.
________ __________ ____ ______ ________ __________ ____.
________ ______ _______ ____ ___ _________ ________ _____ _______.
___ ________ ________ ___ ____ __________ ____ _______.
____ ______ _____ ___ ___ _________ ______.
________ ________ _________ ________ ___ ______ _____ ________ __________ ________.
_______ ____ ____ __________ _________ ____ __________ ____ _____ ______.
__________ _________ _______ ______ __________ _________ _____ _________ _______.
_________ _________ ______ _______ _________ ________ _______ _______ ________.
_____ ____ ______ ___ ______ ___.
_____ ____ ___ ____ ___ _______ _____.
____ _________ _________ __________ _______ __________ _____.
____ __________ ________ ___ __________ ___ _____ ______ _______ ___ _____.
__________ __________ _______ ___ ___.
__________ ________ _____ _______ _______.
_______ ______ ____ ____ _____ ____ ______ ______.
______ _________ ____ ________ ___ __________ ___ ______ __________ __________.
_________ ________ ____ ____ ____ _______ ___ ____ _________.
__________ _____ __________ ________ ________ _____ _________.
______ ________ _______ ______ _____ ___ _____ ______ ________ ___ _________.
____ _______ ____ __________ _______ ____.
_______ _____ __________ _________ ______ _____ _______ ______.
_________ ___ _________ ________ ______ _____ _______ __________ ____.
_________ _________ _______ _______ ______ ________.
_______ ________ ______ ________ _______ ___ ________ ___ __________ ______ __________.
__________ _________ _______ _________ _____ ___ ___ ________ ______ ________ _________ ______.
_________ __________ ____ ________ _______ _________ ______ __________ _________ _________ _________.
_________ ___ _______ ______ _____ _____ _____ __________ ____ _______.
______ __________ _____ _____ _______ ____ _______.
____ ____ _______ ____ _____ ____ _______ ________.
______ ________ ___ ___ ___ _________ ______ _______.
____ _________ _______ __________ ___ _______ _______ _______ __________ ________.
______ _____ ______ ____ ______ ______ _____ _________.
______ ___ ______ ___ ___ _______ _______ _____.
________ ___ _________ __________ ______ __________ ________ __________ __________ _________.
______ _________ _____ ________ ____ ______ _______.
_______ ___ __________ _____ ____ ______.
________ _________ _______ ___ ______ _________ ____ _______ _______ _________ _______.
____ ______.
Get Full Answer on WhatsApp