sponges

are sessile, irregular animals which look like plants..

Sponge The simplest multicellular animals. The cells are loosely held together and do not form tissues. Aquatic in habitat (mostly marine). Ostia (pores) are present all over the body, with a single large opening on top called osculum. Food and oxygen enter the organism along..

The simplest multicellular animals. The cells are loosely held together and do not form tissues. Ostia (pores) are present all over the body, with a single large opening on top called osculu..

The capacity of regeneration varies in its extent in various animal groups. Regenerative capacity is very high among the protozoan, sponges and coelenterat..

: In this group cells do not form tissues. Hence, animals have remained at the acellular grade or organisation. For example, Sponges..

In unicellular organisms a single cell carries out all the life processes as the cell itself is the organism. In advanced forms like the few-celled algae, protozoa, sponges, etc., the size of the organism ensures that all the cells are not very far from each othe..

Introduction - In unicellular organisms a single cell carries out all the life processes as the cell itself is the organism. In advanced forms like the few-celled algae, protozoa, sponges, etc., the size of the organism ensures that all the cells are not very far from each othe..

Primitive multicellular animals with cellular grade of organisation. Free living aquatic, mostly marine, sedentary forms either solitary or colonial. Body with a large number of incurrent pores called ostia leading into a spongocoel through a system of canals, Spongocoel opening out by one ..

Cilia and flagella are fine vibratile cytoplasmic processes arising from basal bodies. They are similar in their structure, chemical composition and function. Both serve to propel the organism or move a medium past a fixed cell. However, they differ in their size, number and mode of beating. Flage..