NTA Abhyas NEET2020BotanyAnimal KingdomPractice
Which of these statements is incorrect about Platyheminthes?
Options
- ASome members like Planaria possess high regeneration capacity.
- BThey are bilaterally symmetrical, triploblastic and acoelomate animals with organ level of organisation.
- CTheir sexes are separate, fertilisation is internal and development is through many larval stages.
- DThey have specialised cells called flame cells which help in osmoregulation and excretion
Correct answer
C. Their sexes are separate, fertilisation is internal and development is through many larval stages.
Step-by-step solution
Platyhelminthes of flat worms have dorso-ventrally flattened body hence they will appear rectangular in cross section. These are mostly endoparasites found in animals including human beings. Flatworms are bilaterally symmetrical, triploblastic and acoelomate animals with organ level of organisation. Hooks and suckers are present in the parasitic forms. Some of them absorb nutrients from the host directly through their body surface. Specialised cells called flame cells help in osmoregulation and excretion. Sexes are