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Tadpoles of frog can be made to grow as giant sized tadpoles, if they are
- a)administered antithyroid substance like thiourea
- b)administered large amounts of thyroxine
- c)reared on a diet rich in egg yolk
- d)reared on a diet rich in both egg yolk and glucose
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
Tadpoles of frog can be made to grow as giant sized tadpoles, if they...
Explanation:
The correct answer is A: administered antithyroid substance like thiourea.
- Thiourea is an antithyroid substance that inhibits the production of thyroid hormones.
- Tadpoles require thyroid hormones for metamorphosis, the process of transforming from a tadpole to a frog.
- When tadpoles are administered antithyroid substances like thiourea, their metamorphosis is delayed, and they continue to grow as tadpoles, ultimately reaching a giant size.
- Thus, administration of antithyroid substances can result in giant-sized tadpoles.
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Community Answer
Tadpoles of frog can be made to grow as giant sized tadpoles, if they...
Introduction:
Tadpoles are the larval stage of frogs, and their growth and development are regulated by the hormone thyroxine. Manipulation of thyroxine levels can have significant effects on tadpole growth. Among the given options, administering antithyroid substance like thiourea is the correct answer to make tadpoles grow as giant-sized tadpoles. Let's understand why this is the case.
Explanation:
Thyroxine is a hormone produced by the thyroid gland and plays a crucial role in the growth and development of tadpoles into frogs. It regulates the metamorphosis process, leading to the transformation of tadpoles into adult frogs. The level of thyroxine is tightly controlled in the body to ensure proper development.
Effect of Antithyroid Substance:
Administering an antithyroid substance like thiourea to tadpoles inhibits the production and release of thyroxine. This leads to a decrease in the level of thyroxine in the body, resulting in delayed or halted metamorphosis. Tadpoles that do not undergo metamorphosis continue to grow as giant-sized tadpoles.
Role of Thyroxine in Metamorphosis:
During normal development, thyroxine triggers the metamorphosis process, causing various changes in tadpoles. These changes include the growth of limbs, resorption of the tail, development of lungs, and changes in the digestive system. Without sufficient thyroxine, these changes do not occur, and the tadpoles remain in their larval form.
Other Options:
- Administering large amounts of thyroxine (option B) would actually accelerate the metamorphosis process, leading to early transformation into frogs. This would not result in giant-sized tadpoles.
- A diet rich in egg yolk (option C) or a diet rich in both egg yolk and glucose (option D) may provide essential nutrients for tadpole growth but does not directly affect the production or release of thyroxine.
Conclusion:
Administering an antithyroid substance like thiourea inhibits the production and release of thyroxine, leading to delayed or halted metamorphosis. Tadpoles that do not undergo metamorphosis continue to grow as giant-sized tadpoles. This manipulation of thyroxine levels can be used to study the effects of thyroxine on tadpole growth and development.
Tadpoles are the larval stage of frogs, and their growth and development are regulated by the hormone thyroxine. Manipulation of thyroxine levels can have significant effects on tadpole growth. Among the given options, administering antithyroid substance like thiourea is the correct answer to make tadpoles grow as giant-sized tadpoles. Let's understand why this is the case.
Explanation:
Thyroxine is a hormone produced by the thyroid gland and plays a crucial role in the growth and development of tadpoles into frogs. It regulates the metamorphosis process, leading to the transformation of tadpoles into adult frogs. The level of thyroxine is tightly controlled in the body to ensure proper development.
Effect of Antithyroid Substance:
Administering an antithyroid substance like thiourea to tadpoles inhibits the production and release of thyroxine. This leads to a decrease in the level of thyroxine in the body, resulting in delayed or halted metamorphosis. Tadpoles that do not undergo metamorphosis continue to grow as giant-sized tadpoles.
Role of Thyroxine in Metamorphosis:
During normal development, thyroxine triggers the metamorphosis process, causing various changes in tadpoles. These changes include the growth of limbs, resorption of the tail, development of lungs, and changes in the digestive system. Without sufficient thyroxine, these changes do not occur, and the tadpoles remain in their larval form.
Other Options:
- Administering large amounts of thyroxine (option B) would actually accelerate the metamorphosis process, leading to early transformation into frogs. This would not result in giant-sized tadpoles.
- A diet rich in egg yolk (option C) or a diet rich in both egg yolk and glucose (option D) may provide essential nutrients for tadpole growth but does not directly affect the production or release of thyroxine.
Conclusion:
Administering an antithyroid substance like thiourea inhibits the production and release of thyroxine, leading to delayed or halted metamorphosis. Tadpoles that do not undergo metamorphosis continue to grow as giant-sized tadpoles. This manipulation of thyroxine levels can be used to study the effects of thyroxine on tadpole growth and development.
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Tadpoles of frog can be made to grow as giant sized tadpoles, if they area)administered antithyroid substance like thioureab)administered large amounts of thyroxinec)reared on a diet rich in egg yolkd)reared on a diet rich in both egg yolk and glucoseCorrect answer is option 'A'. Can you explain this answer?
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