Addition of a trace of thyroxine or iodine in water containing tadpoles willA. keep them in larval staggeB. hasten their metamorphosisC. slow down their metamorphosisD. kill the tadpoles

Addition of a trace of thyroxine or iodine in water containing tadpole

1.	Addition of a trace of thyroxine or iodine in water containing tadpoles willA. keep them in larval staggeB. hasten their metamorphosisC. slow down their metamorphosisD. kill the tadpoles
Answer» Correct Answer - B Thyroxine controls tissue differentiation and metamorphosis of tadpole larva into frog. Gundernatch (1912) proved that metamorphosis of tadpole into adult frog is controled by thyroxine. Addition of thyroxine in water will hasten the metamorphosis

Discussion

No Comment Found

Related InterviewSolutions

On an educational trip to Uttaranchal, Ketki and her friends observe that many local people were having swollen necks, Please help Ketki and her friends to find out the solutions to the following questions. ( a) which probable disease are these people suffering from? (b) How is it caused? (c) What effect does this condition have on pregnancy?
Withdrawal of which of the following hormones is the immediate cause of menstruation?A. OestrogenB. FSHC. FSH-RHD. Progesterone
Which of the following hormones regulates growth and metamorphosis in insectsA. Juvenile hormoneB. Brain hormoneC. EcdysonD. Prothoracicotropic hormone
Secretion of large quantities of oestrogen causesA. growth of Fallopian tubeB. growth of mammary glandC. enlargement of female external genitaliaD. All of the above
In a pregnant woman having prolonged labour pains, if child birth has to be hastened i.e. to aid parturition, it is advisable to administer a hormone that canA. activate the smooth musclesB. increase the metabolic rateC. tighten the pelvic ligamentD. stimulate the ovary
The hormone mainly concerned with thermoregulation in the body isA. `T_(3)` hormoneB. `T_(4)` hormoneC. thyroxinD. All of these
Which of the following organs in mammals does not consist of acentral medullary rregion surrounded by a cortical region?A. OvaryB. AdrenalC. LiverD. Kidney
A patient who excretes large quantity of sodium in urine hasA. Diseased adrenal medullaB. Diseased adrenal cortexC. Diseased pancreasD. Diseased thymus
After receiving a hormonal shot, an asthma patient will get relief in exhaling the air. The hormone injected will beA. OxytocinB. AdrenalinC. InsulinD. Thyroxine
A health disorder that results from the deficiency of thyroxine in adults and is characterized by (i) a low metabolic rate, (ii) increase in body weight, and (iii) tendency to retain water in tissues isA. MyxoedemaB. CretinismC. HypothyroidismD. Simple goiter

Addition of a trace of thyroxine or iodine in water containing tadpoles willA. keep them in larval staggeB. hasten their metamorphosisC. slow down their metamorphosisD. kill the tadpoles

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment