The earthworm is part of the phylum Annelida and in their life cycle, there are no larvae. It has cocoons that burrow on the ground into a young worm and eventually a mature worm.
What is the life cycle of earthworms?
It usually takes between 10 and 55 weeks for baby worms to mature into their full adult size. Once earthworms have reached adulthood – which can can be at four to six weeks – they're mature enough to reproduce and the cycle begins all over.
Which animal does not have larval stage?
Earthworms belong to an Annelida which reproduces sexually. Cocoon contains many fertilised eggs but only one embryo completes development, while other ova serve as nurse cells. The development is direct without a free larval stage.
What are the stages of a worm?
Teacher Content: Explain that there are 4 stages of the worm's life cycle: egg, baby, juvenile, adult. Show them the plates/trays where they will create their cycle. Show them the containers of worms and model how to respectfully hunt.
How does earthworm reproduce?
How do they reproduce? Earthworms are hermaphrodites, so individuals have both female and male organs. They mate by aligning themselves in opposite directions at their gonadal openings and exchanging packets of sperm. Each earthworm will form an egg capsule in its clitellum and pass it into the environment.
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