Body Segmentation in Animal Kingdom — NEET Biology
📚 Practice ConceptSegmentation in the body is first observed in which of the following:
Which of the following statements regarding reproduction and development across early animal phyla (Porifera, Cnidaria, Ctenophora) are NOT correct? S1: Sponges are typically monoecious, producing both eggs and sperms, and exhibit internal fertilisation. S2: Metagenesis, an alternation of generations, is observed in some cnidarians where polyps produce medusae asexually and medusae form polyps sexually. S3: Ctenophores are exclusively dioecious with external fertilisation and direct development, exhibiting bioluminescence. S4: In Porifera, asexual reproduction mainly occurs through fragmentation, and their development involves a morphologically distinct larval stage. S5: Both Cnidarians and Ctenophores are characterized by the absence of larval stages, indicating direct development in these phyla.
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