1. Tardigrade
  2. Question
  3. Biology
  4. Rhodnius, a blood-sucking bug, shows five instars before it metamorphoses into an adult. It has a very long head with the brain located at its tip and an organ called Corpora Cardiaca (CC) behind it.The hormone that ensures the continuum of the juvenile stages is called a juvenile hormone. Behind the head is a pro-thoracic gland, which gets triggered by the Pro-Thoracico-Tropic Hormone (PTTH) to release ecdysone required for molting into an adult. <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/biology/e0d5fb79f1fa4ef35835887cf9beaca0-.png /> The following observations were made when the juveniles of this insect were subjected to various conditions: 1. Starved juveniles (any instar) when decapitated remained juveniles and did not molt into adults. 2. Well-fed juveniles (any instar) when decapitated -» molted into adults. 3. Starved juveniles (any instar) when partially decapitated to remove the brain cells arrow remained juveniles and did not molt into adults. 4. Well-fed juveniles (any instar) when partially decapitated to remove the brain cellsarrow did not molt into adults. If an unfed, completely decapitated, fifth (final) instar juvenile is connected to a well-fed, decapitated fourth instar juvenile by a glass tube so that fluids can be exchanged, what will be the expected result?

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Q. Rhodnius, a blood-sucking bug, shows five instars before it metamorphoses into an adult. It has a very long head with the brain located at its tip and an organ called Corpora Cardiaca (CC) behind it.The hormone that ensures the continuum of the juvenile stages is called a juvenile hormone. Behind the head is a pro-thoracic gland, which gets triggered by the Pro-Thoracico-Tropic Hormone $(PTTH)$ to release ecdysone required for molting into an adult.
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The following observations were made when the juveniles of this insect were subjected to various conditions:
1. Starved juveniles (any instar) when decapitated remained juveniles and did not molt into adults.
2. Well-fed juveniles (any instar) when decapitated -» molted into adults.
3. Starved juveniles (any instar) when partially decapitated to remove the brain cells $\rightarrow$ remained juveniles and did not molt into adults.
4. Well-fed juveniles (any instar) when partially decapitated to remove the brain cells$\rightarrow$ did not molt into adults.
If an unfed, completely decapitated, fifth (final) instar juvenile is connected to a well-fed, decapitated fourth instar juvenile by a glass tube so that fluids can be exchanged, what will be the expected result?

Animal Kingdom

Solution:

Correct answer is (b) Both bugs will molt into adult forms