wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

It was observed that the tadpoles are not growing into adult frogs in a village pond. A scientist who was asked to find the reason for this concluded that the pond water did not contain a sufficient amount of a mineral P which could make a hormone Q. The hormone Q can cause a phenomenon R in tadpoles so that they become adult frogs.

(a) What are (i) P (ii) Q, and (iii) R?

(b) Name one human disease which can also be caused due to the deficiency of P in the food and water.

Open in App
Solution

(a) 1. Iodine 2. Thyroxine 3. Metamorphosis

(b) Iodine is needed continuously by the thyroid gland to make the thyroxine hormone. If people do not have enough iodine in their diet, they will get goiter disease caused by a lack of thyroxine. So, people are advised to use iodized salt in cooking food.


flag
Suggest Corrections
thumbs-up
21
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Our Great Glands
BIOLOGY
Watch in App
Join BYJU'S Learning Program
CrossIcon