In which of the following phylum, would you place an animal with a bilaterally symmetrical, triploblastic body without a true internal cavity (coelom) ?
[amp_mcq option1=”Porifera” option2=”Platyhelminthes” option3=”Cnidaria” option4=”Annelida” correct=”option2″]
This question was previously asked in
UPSC CAPF – 2020
Phylum Platyhelminthes (flatworms) are characterized by bilateral symmetry and being triploblastic (having three germ layers: ectoderm, mesoderm, and endoderm). They lack a true coelom, meaning they are acoelomate – the space between the body wall and the digestive tract is filled with mesodermal tissue.