Question

What is multicellular organism

Answer 1

In biology, it is called multicellular, an organism formed by more than one cell, but unlike multicellular beings, it does not form tissues because they have a simpler structure. Now, the pluricellular beings are the beings constituted by several cells and that have differentiation between them, making it capable of forming tissues.

Animals and plants are examples of multicellular organisms. And algae and fungi are examples of multicellular.

Answer 2

Multi cellular organism is an organism that consists of many cells unlike unicellular which consists of a single cell.

The first picture is of multicellular organisms.
The second, for more information, is of unicellular organisms