Question

Aquatic amphibians are ammonotelic in
A) Adult stage
B) Larval stage
C) Immature stage
D) Both A and B

Answer 1

Hint: The classification of organisms made according to the organisation of the cell, tissue, habitat of the organisms, and the structural differentiation. Amphibians are the group involved in the animal kingdom and they are aquatic and terrestrial as well.

Complete Answer:
- Frog belongs to the amphibian group. Amphibians are cold blooded organisms with backbone; the temperature of the organisms depends on the environment.
- Amphibians live in both land and water, they start their lives as eggs in the water and then develop into tadpoles that breathe with the help of gills. At the end of their life, they live in lands as an adult.
- Now, the life cycle of the amphibians includes the egg stage that starts their lives in water. The female amphibians lay many eggs that are fertilized outside the body by the sperm of the male amphibians. Some of the eggs do not make it to adulthood, the eggs that get fertilized and survive get hatch in 7 to 9 days.
- The next stage is the tadpole stage, after the hatching of the eggs the formation of tadpoles takes place, the tadpole’s breath with the help of gills and survives by eating of the yolk. As the tadpoles get matured, the yolk disappears and starts eating algae.
- After four weeks the tadpoles start growing teeth and the skin over the gills. Within 6 to 9 weeks it’s developed and grows legs and heads and by the end of the nine weeks the tail is formed and begins to eat insects. The last stage is metamorphosis, in this stage the tadpoles are developed into an adult.
- The amphibians look like a tiny frog with a tail. In the end of the metamorphosis the tail got lost and the frog developed a long tongue. These three stages of life are about 16 weeks, therefore, aquatic amphibians are ammonotelic in the adult and larval stage.

Note: The amphibian includes toads, salamanders, frogs, and newts and all of them lay their eggs in the water. The young found in the water used to hatch the eggs and fertilised by the male amphibian. All of them undergo the same three stages of life cycle as mentioned above.