Question

The development in frog is
A)Direct
B)Indirect
C)Parthenogenetic
D)None of the above

Answer 1

Hint: The frog undergoes metamorphosis to change into an adult. The frogs have various stages in their lifecycle. The female lays eggs which hatch as tadpole, larva, froglets then develops into a complete frog.

Complete answer:
The series of changes which an organism undergoes to convert into an adult is known as metamorphosis. The different stages of metamorphosis in the lifecycle of a frog are Egg, tadpole, froglet and the adult frog. The adult frog is totally different from that of the tadpole.
The tadpoles respire through gills whereas the adults have lungs for respiration.
The adults have four limbs which tadpoles do not.
The lateral line in the tadpole disappears once it becomes an adult.

The development in the frog undergoes several changes where the larval form is totally different than that of an adult. This type of development is known as indirect development. It is the characteristic feature of all amphibians.

Direct development- In this type of development, the egg hatches to produce a fully formed miniature adult. The intermediate stages are absent in this type of development. Reptiles, birds undergo direct development.

Parthenogenetic development: It is a type of reproduction in which a female is developed without fertilisation. It occurs in lower plants and invertebrates.

Hence, the correct answer is option (B)

Note: The larval stage in the frog called the tadpole is sexually immature. The indirect development is also seen in echinoderms, insects. The development in frogs is regulated by the hormone called the thyroid hormone.