Multiple Choice QuestionsRetrogressive metamorphosis occurs in
Hemichordata
Cephalochordata
Urochordata
Vertebrata
C.
Urochordata
Metamorphosis is a change from the juvenile to adult stage in which larval stage is quite different from the adult stage.
In retrogressive metamorphosis, the larva possesses advanced characters which are lost during the development and the adult is either sedentary or degenerated with primitive characters.
Urochordate adults, being sedentary show degenerative characters, while the free swimming tadpole larva shows advanced chordate characters which are lost during metamorphosis. Parasitic crustaceans, like Sacculina and copepod parasites and stylopids and scale insects (Insecta) also show retrogressive metamorphosis.
Which of the following animal belongs to class-Crustacea?
Cockroach
Cyclops
Grasshopper
Mosquito
the scientific name of Asian Tiger Mosquito
Aedes aegypti
Aedes albopictus
Aedes taeniorhynchus
Aedes albolineatus
Which of the following is not correctly matched?
Sycon - Canal system
Star fish - Radial symmetry
Ascaris - Flame cell
Prawn - Haemocoel
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