Parazoa are simple multicellular animals which are believed to have evolved from?
Correct answer: B. Protists
- A. Bacteria
- B. Protists
- C. Fungi
- D. Plants
Explanation
Parazoa is a subkingdom of animals that includes simple multicellular organisms, such as sponges (Phylum Porifera). They are believed to have evolved from protist ancestors, specifically from single-celled flagellated protists.Protists are a diverse group of eukaryotic microorganisms that don't fit into any of the traditional kingdoms (Animalia, Plantae, Fungi, or Monera). They share characteristics with animals, such as motility and heterotrophy (obtaining energy by consuming other organisms), but lack true tissues and organs.The evolutionary transition from protists to parazoans likely involved the development of:1. Multicellularity2. Cell differentiation3. Simple tissue organization
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About Kingdom Animalia
Animals are multicellular, heterotrophic eukaryotes whose cells lack cell walls and chloroplasts, with specialised tissues in most groups. Coverage includes body symmetry, tissue layers, coelom, segmentation and levels of organisation, plus major phyla such as Porifera, Cnidaria, Platyhelminthes, Annelida, Arthropoda, Mollusca and Chordata.
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