Question

Axolotl larva of Ambystoma normally fails to metamorphose, the reason is

• A. Absence of phosphorus in water
• B. Lack of iodine in water or diet
• C. Lack of Ca and Mg ions in water
• D. Low concentration of Na and K in water

Answer 1

The correct option is B Lack of iodine in water or diet

The axolotl is an unusual species of salamander which retains its larval features, such as gills, and remains aquatic throughout its life. It fails to metamorphose because of lack of iodine in water or diet as per some scientists believe. But despite remaining in a larval form, the axolotl does become sexually mature and reproduces at around 12 to 18 months old. Therefore, the correct answer is option B.