Choose the correct combination of the following:

  • A
    Annelida and Porifera - Phyla
  • B
    Aves and Chordata - Classes
  • C
    Mollusca and Hydrozoa - Classes
  • D
    Oligochaeta and Arthropoda - Phyla

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What is common between $Ascaris$ $lumbricoides$ and $Anopheles$ $stephensi$?

Match the following columns:
Column-$I$Column-$II$
$(a)$ Contractile vacuole$(i)$ Excretory unit
$(b)$ Parapodia$(ii)$ Food ingestion
$(c)$ Flame cells$(iii)$ Locomotion
$(d)$ Nematocysts$(iv)$ Osmoregulation

Which of the following statements is false?

What is true about $Nereis$,scorpion,cockroach,and silver fish?

Mention one example each for animals with a chitinous exoskeleton and those covered by a calcareous shell.

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