Role Of Hormones In Completing The Life History Of Insects And Frogs
key notes:
- Introduction to Hormones:
- Hormones are chemical messengers produced by glands in the body that control various physiological processes.
- Metamorphosis in Insects:
- Insects undergo metamorphosis, a process of change in their body structure during different life stages.
- Metamorphosis in insects can be categorized into two main types: incomplete metamorphosis and complete metamorphosis.
- Role of Hormones in Insects:
- In insects, juvenile hormones and ecdysone are the main hormones responsible for metamorphosis.
- The juvenile hormone helps in maintaining the larval stage characteristics.
- Ecdysone triggers molting, which is the shedding of the old exoskeleton to allow growth.
- Complete Metamorphosis (Holometabolism) in Insects:
- Insects like butterflies and beetles undergo complete metamorphosis.
- The stages include egg, larva (caterpillar), pupa (chrysalis), and adult.
- Hormones play a crucial role in transitioning between these stages.
- Metamorphosis in Frogs:
- Frogs also go through a type of metamorphosis during their life cycle.
- Their life stages include egg, tadpole, and adult frog.
- Role of Hormones in Frogs:
- Thyroxine hormone plays a significant role in frog metamorphosis.
- Thyroxine helps in the development of tadpoles into adult frogs.
- It triggers the growth of limbs and the disappearance of the tail.
- Adaptive Significance:
- Metamorphosis and the role of hormones in insects and frogs have adaptive significance.
- It allows them to exploit different ecological niches during their life cycle, increasing their chances of survival.
- Conclusion:
- Hormones play a crucial role in completing the life history of insects and frogs by orchestrating the changes in their body structures during metamorphosis.
Let’s practice!
