Real organs are absent in

  • A
    Mollusca
  • B
    Arthropoda
  • C
    Coelenterata
  • D
    Echinodermata

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Similar Questions

Write the most striking features of the following phyla:
$(i)$ Arthropoda
$(ii)$ Amphibia
$(iii)$ Porifera

What is the difference between algae and fungi?

Write true $(T)$ or false $(F)$ for the following statements:
$(a)$ Whittaker proposed five kingdom classification.
$(b)$ Monera is divided into Archaebacteria and Eubacteria.
$(c)$ Starting from Class,Species comes before the Genus.
$(d)$ Anabaena belongs to the kingdom Monera.
$(e)$ Blue green algae belongs to the kingdom Protista.
$(f)$ All prokaryotes are classified under Monera.

Label $X$ and $Y$ in the given diagram of Hydra.

Differentiation in segmental fashion occurs in

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