Which of the following must be present in water for metamorphosis of tadpole into adult frog?
Correct Answer : d ) IodineExplanation :
Iodine must be present in water for the metamorphosis of tadpole into adult frog. Tadpole (larva of frog) cannot develop into an adult frog if the water in which the tadpoles are growing does not contain sufficient iodine because thyroxine hormone controls metamorphosis of frogs and its production requires the presence of iodine in water.
Hence, (d) is the correct answer.
Questions related to Science are generally asked in exams like UPSC CSE, State PCS, SSC CGL, SSC CHSL, SSC CPO, RRB NTPC, CDS, UP SI, etc.
Read Daily Current Affairs, Banking Awareness, Hindi Current Affairs, Word of the Day, Study Material for GK, Study Material for Quant and attempt free mock tests at PendulumEdu and boost your preparation for the actual exam.
Word Of The Day
Noun: A hard rigid usually large covering of an animal.; The outside part of a fruit or seed.; Something like an external structure that resembles a shell.; A casing without substance.; The hard exterior of an egg.; A hard enclosing cover.
Verb: To take out of the shell.; To fall out of the shell.; To cast the external covering.; To gather shells from a beach.
"My mother collected shells at the beach."View More