is the reason why tadpoles cannot become frogs? Frogs are widely distributed in our country. However, they are not frogs hatched from fertilized eggs, but are first hatched into tadpoles. After metamorphosis and development, tadpoles can become frogs. However, not all tadpoles can develop into frogs smoothly, and many tadpoles can not develop into frogs for various reasons. One of the most important reasons is that there is too little thyroid hormone in tadpoles, because thyroxine is the main substance to promote the metamorphosis and development of tadpoles.
When tadpoles reach the peak of their metamorphosis, the level of thyroid hormone is the highest, and after this stage, the level of this hormone will decline to a certain extent. Only this hormone can promote the development of various organs of tadpoles into frog organs, such as the tail of tadpoles under the action of this hormone. Then their hind and forelimbs can grow back. Specifically, there are many reasons for the low thyroid hormone level of tadpoles. For example, if the thyroid gland of a tadpole is damaged, the secretion of thyroid hormone will be affected, and the tadpole will not develop into a frog. For another example, the iodine in the body of a tadpole is too low, and this element is the main element for the synthesis of thyroid hormone, so iodine deficiency is also an important factor.
? The lack of thyroid hormone is the main reason why tadpoles can not become frogs. Therefore, if you want tadpoles to become frogs, an important aspect is to ensure that they get enough thyroid hormone. In addition to the thyroid hormone they secrete, they can also sprinkle some in the water properly, which can make them turn into frogs faster. Furthermore, to provide them with adequate nutrition and appropriate external environment, they can eat nutritious egg yolk or fish and insects appropriately. In addition, water environmental factors such as water temperature and water quality need to be paid attention to.
