Question

Animals having well-marked digestive cavity are included under

• A. parazoa
• B. enterozoa
• C. mesozoa
• D. protozoa

Answer 1

The correct option is B enterozoa

Enterozoans are organisms which have a distinct functional digestive tract. Humans and most larger animals are examples of enterozoa.

Parazoa are multicellular organisms such as sponges which have a cellular level of body organisation.

Mesozoans are multicellular, worm-like parasites of marine invertebrates. They are tiny organisms that lack a digestive system.

Protozoans are the single-celled, eukaryotic organisms which belong to the kingdom Protista. Example: Amoeba, Paramecium.