Question

Choose the correct answers from the alternatives given.
Animals that have three layers of embryonic tissue and have one solid mass of tissue rather than tissues and organs nestled inside a body cavity are:

• A. acoelomate
• B. eucoelomate
• C. pseudocoelomate
• D. coelomate

Answer 1

The correct option is A acoelomate

An acoelomate is an animal that does not possess a body cavity. Unlike coelomates (eucoelomates), animals with a true body cavity, acoelomates lack a fluid-filled cavity between the body wall and digestive tract. An acoelomate is the simplest form of animals which have 3 true tissues. These tissues are the ectoderm, mesoderm, and endoderm, in that order from inside to out. In an acoelomate, these tissues touch back-to-back, without any space in between. The organs form within it and are surrounded by the mesoderm.

So, the correct option is, 'acoelomate'.