Presence of canal system - a network of channels for water transport - is an important feature in sponges. Ascon type of canal is simplest in Porifera which brings in food, oxygen and carries away CO₂ and nitrogenous waste.

Correct Option: A

Presence of canal system - a network of channels for water transport - is an important feature in sponges. Ascon type of canal is simplest in Porifera which brings in food, oxygen and carries away CO₂ and nitrogenous waste.

Rostellum and hooks are absent in Taenia saginata.

Correct Option: C

Rostellum and hooks are absent in Taenia saginata.

Budding is an asexual mode of reproduction in Hydra & sponges. Bud is formed as an outgrowth on the body surface, then detached to form new animal.

Correct Option: B

Budding is an asexual mode of reproduction in Hydra & sponges. Bud is formed as an outgrowth on the body surface, then detached to form new animal.

Platyhelminthes includes flat warms. There is no body cavity. The animals are therefore acoelomates. Annelids also have bilateral symmetry. They are coelomate having a perivisceral cavity divided into compartments.

Correct Option: A

Platyhelminthes includes flat warms. There is no body cavity. The animals are therefore acoelomates. Annelids also have bilateral symmetry. They are coelomate having a perivisceral cavity divided into compartments.

Sponges show cellular grade of organization. They do not have tissue system. Sycon is a sponge.

Correct Option: C

Sponges show cellular grade of organization. They do not have tissue system. Sycon is a sponge.