NEET BIOLOGY

Detailed explanation-1: -Lowest level of organization among eumetazoans is tissue level.

Detailed explanation-2: -Eumetazoa is considered a sub-kingdom under Animalia. These animals have neurons, true tissue organisation, and even show embryo development. They comprise the bilaterians and the radiates. Some notable phylum under the Eumetazoa are – Echinodermata, Arthropoda, Nematoda, Platyhelminthes, Mollusca and Annelida.

Detailed explanation-3: -Traditionally, Eumetazoans are a major group of animals in the Five Kingdoms classification of Lynn Margulis and K. V. Schwartz, comprising the Radiata and Bilateria-all animals except the sponges.

Detailed explanation-4: -An organism is made up of four levels of organization: cells, tissues, organs, and organ systems. These levels reduce complex anatomical structures into groups; this organization makes the components easier to understand.