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Animal Kingdom
The characteristic larva of Phylum- 'Coelenterata' is
planula
cysticercus
rhabdiform
wriggler
A.
planula
Coelenterata or Cnidaria shows both sexual and asexual reproduction. The larval stages are planula (Obelia) and ephyra (Aurelia).
Cysticercus is a bladder worm and the third level stage in Taenia. It is visible after the hexacanth is released in the stomach of pig, which goes in the blood circulation and on reaching muscles appears as bladderworm.
Rhabditiform is the first larval stage in Ascaris. It is a non- infective juvenile stage which rests for a week and completes first moult within egg and becomes second stage which is infective.
Wriggler is the larva of mosquito. It is free swimming, active, aquatic larva performing wriggling movements. It has life span of 3- 4 days.
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Distinguish between intracellular and extracellular digestion?
What is the difference between direct and indirect development?
What are the peculiar features that you find in parasitic platyhelminthes?
What are the reasons that you can think of for the arthropods to constitute the largest group of the animal kingdom?
Water vascular system is the characteristic of which group of the following:
“All vertebrates are chordates but all chordates are not vertebrates”. Justify the statement.
How important is the presence of air bladder in Pisces?
What are the modifications that are observed in birds that help them fly?
Could the number of eggs or young ones produced by an oviparous and viviparous mother be equal? Why?
Segmentation in the body is first observed in which of the following
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