Question

Complete metamorphosis present in
A. Housefly and mosquito
B. Housefly and cockroach
C. Mosquito and cockroach
D. None of the above

Answer 1

Hint: Metamorphosis is a biological process in the life of an insect by which it develops into an adult by going through different stages of life like a pupa, larva, nymph after hatching from an egg or after birth. So metamorphosis is simply defined as the life cycle of an insect and an important part of its life.

Complete answer: Different types of life cycle in insects:
-Holometabolous life cycle- In this life cycle, there is a complete metamorphosis from larva to adult or imago i.e. adult to egg to larva to pupa. The pupal stage is present. Examples are fleas and flies. During this life cycle, the larval stage is more active and eating whereas the pupal stage is not active.
-Hemimetabolous life cycle- In this type of life cycle, there is an incomplete metamorphosis from larva to adult i.e. pupal stage is absent. The life cycle is imago to eggs to larva to the nymph. During this type of life cycle morphological structures of larva, nymph, imago are similar but the difference mainly lies in that in the adult stage reproductive organs are developed. Examples are lice and bugs.
In option -A- Housefly and mosquito are mentioned. Both mosquito and housefly come under Order Dipteran of Class Insecta. These come under flies. Flies show complete metamorphosis from larva to imago. So, there is a complete metamorphosis in them.
In option -B- Housefly and cockroach are mentioned. Housefly shows complete metamorphosis but in cockroach-like other insects, there is incomplete metamorphosis i.e. the pupal stage is absent in them.
In option -C- Mosquito and cockroach are mentioned. Mosquito flies show complete metamorphosis and cockroach incomplete metamorphosis.
In option -D- None of the above
Hence, the correct answer to this question is option” A” i.e. Housefly and mosquito

Note: Class Insecta includes orders Hemiptera, Siphunculata, Mallophaga which shows incomplete metamorphosis, and orders Siphonaptera and Diptera which shows complete metamorphosis.