- Created by: Elisew
- Created on: 07-12-17 14:09
Multicellular organisms like animal and plants have evolved from unicellular organisms because groups of cells with different functions working together as one unit can make use of resources more efficiently than single cells operating on their own.
They have to specialise to take on different roles in tissues and organ. They may be required to form barriers such as skin or be motile such as sperm cells. Cells have adapted to different roles in an organism and so have many shapes and sizes and often contain different organelles.
Erythrocytes and neutrophils are…