Question

Which one is the group of bilaterally symmetrical and triploblastic animals?

• A. Sponges
• B. Coelenterates
• C. Ctenophores
• D. Aschelminthes

Answer 1

The correct option is D Aschelminthes

Nematodes

$\to$ The body of nematodes is circular, hence

also called round worms

$\to$ These may be free-living or parasitic

$\to$ Organ -system level of body organisation

$\to$ Bilaterally symmetrical

$\to$ triploblastic

$\to$ pseud o codomate

$\to$ Seperate sexes

$\to$ Internal fertilisation

Examples - Ascaris, Wachreria, Anylostma