search
arrow-left Previous
Next arrow-right
Q: The organism related to the phylum ____ are also called flatworms.
  • A. Cnidaria
  • B. Platyhelminthes
  • C. Ctenophora
  • D. Porifera
Correct Answer: Option B - The phylum Platyhelminthes is commonly referred to as flatworms because their bodies are flattened dorsoventrally, meaning from the dorsal (back) to the ventral (belly) side. This flat shape is an adaptation that allows the diffusion of oxygen and nutrients throughout their body, as they lack specialized circulatory and respiratory systems. The name ''Platyhelminthes'' itself is derived from the Greek word ''Platy'' meaning flat, and ''helminth'' meaning worm
B. The phylum Platyhelminthes is commonly referred to as flatworms because their bodies are flattened dorsoventrally, meaning from the dorsal (back) to the ventral (belly) side. This flat shape is an adaptation that allows the diffusion of oxygen and nutrients throughout their body, as they lack specialized circulatory and respiratory systems. The name ''Platyhelminthes'' itself is derived from the Greek word ''Platy'' meaning flat, and ''helminth'' meaning worm

Explanations:

The phylum Platyhelminthes is commonly referred to as flatworms because their bodies are flattened dorsoventrally, meaning from the dorsal (back) to the ventral (belly) side. This flat shape is an adaptation that allows the diffusion of oxygen and nutrients throughout their body, as they lack specialized circulatory and respiratory systems. The name ''Platyhelminthes'' itself is derived from the Greek word ''Platy'' meaning flat, and ''helminth'' meaning worm