Question:
Given below are two statements:
Statement (I): During the moulting process first step is the detachment of old cuticle called "Apolysis".
Statement (II): Cement layer is the outermost layer of the epicuticle but it is absent in Honey bee.
In light of the above statements, choose the most appropriate answer from the options given below:
Given below are two statements:
Statement (I): During the moulting process first step is the detachment of old cuticle called "Apolysis".
Statement (II): Cement layer is the outermost layer of the epicuticle but it is absent in Honey bee.
In light of the above statements, choose the most appropriate answer from the options given below:
Statement (I): During the moulting process first step is the detachment of old cuticle called "Apolysis".
Statement (II): Cement layer is the outermost layer of the epicuticle but it is absent in Honey bee.
In light of the above statements, choose the most appropriate answer from the options given below:
Show Hint
Remember the difference: "Apolysis" is the separation of the cuticle from the epidermis (the first step), while "Ecdysis" is the actual shedding of the old exuviae (the final step).
Updated On: Jul 21, 2026
- Both Statement (I) and Statement (II) are correct
- Both Statement (I) and Statement (II) are incorrect
- Statement (I) is correct but Statement (II) is incorrect
- Statement (I) is incorrect but Statement (II) is correct
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
Molting (ecdysis) is the process by which an insect sheds its rigid exoskeleton to allow for growth.
The exoskeleton (cuticle) consists of multiple layers, including a thin outer epicuticle and a thicker inner procuticle.
Detailed Explanation:
- Analysis of Statement (I): The molting process is initiated when epidermal cells undergo mitosis and secrete molting fluid into the sub-cuticular space.
The first physical step of this process is the separation of the epidermis from the old endocuticle. This detachment is called Apolysis.
Therefore, Statement (I) is correct.
- Analysis of Statement (II): The epicuticle typically consists of four layers: the cement layer (outermost), wax layer, polyphenol layer, and cuticulin layer.
The cement layer is secreted by dermal glands and protects the underlying wax layer from abrasion.
However, this cement layer is absent in some insects, including honeybees and some lepidopterans.
Therefore, Statement (II) is also correct.
Step 2: Final Answer:
Both Statement (I) and Statement (II) are correct, corresponding to option (1).
Molting (ecdysis) is the process by which an insect sheds its rigid exoskeleton to allow for growth.
The exoskeleton (cuticle) consists of multiple layers, including a thin outer epicuticle and a thicker inner procuticle.
Detailed Explanation:
- Analysis of Statement (I): The molting process is initiated when epidermal cells undergo mitosis and secrete molting fluid into the sub-cuticular space.
The first physical step of this process is the separation of the epidermis from the old endocuticle. This detachment is called Apolysis.
Therefore, Statement (I) is correct.
- Analysis of Statement (II): The epicuticle typically consists of four layers: the cement layer (outermost), wax layer, polyphenol layer, and cuticulin layer.
The cement layer is secreted by dermal glands and protects the underlying wax layer from abrasion.
However, this cement layer is absent in some insects, including honeybees and some lepidopterans.
Therefore, Statement (II) is also correct.
Step 2: Final Answer:
Both Statement (I) and Statement (II) are correct, corresponding to option (1).
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