Question:

Flame cells of flatworms help in (i)$\quad$ osmoregulation $\quad$ (ii) $\quad$digestion$\quad$$\quad$ (iii) $\quad$reproduction (iv)$\quad$excretion $\quad$$\quad$$\quad$(v)$\quad$bioluminescence

Updated On: Jun 6, 2022
  • (ii) only is correct
  • (i) and (iv) are correct
  • (iii) only is correct
  • (i) and (v) are correct
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The Correct Option is B

Solution and Explanation

Flame cells are ciliated cells that form part of the excretory and osmoregulatory system of platyhelminthes, rotifers, and nemertine worms. Fluid, containing water and nitrogenous waste products, diffuses into the flame cells and is directed through the tubules to the exterior by movements of the cilia, which resemble the flickering of flames
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Concepts Used:

Animal Kingdom

Animals are eukaryotic, multicellular species that belong to the Kingdom Animalia. Every animal has a distinct characteristic. They get energy either by feeding on plants or on other animals. There are millions of species that have been recognized, few shares similar characteristics while others vary drastically.

Kingdom Animalia comprises all animals. In the midst of the five kingdoms, the largest kingdom is the animal kingdom. Animals are multicellular eukaryotes. Though, like plants, they do not possess chlorophyll or a cell wall. Therefore, members of the animal kingdom indicate a heterotrophic mode of nutrition. Kingdom Animalia is further classified into ten different subphyla based on their body designs or differentiations.

The different phyla of the Kingdom Animalia are as follows:

  1. Porifera
  2. Coelenterata (Cnidaria)
  3. Platyhelminthes
  4. Nematoda
  5. Annelida
  6. Arthropoda
  7. Mollusca
  8. Echinodermata
  9. Hemichordata
  10. Chordata

Read More: Classification of Animal Kingdom