AP BIOLOGY

Detailed explanation-1: -An organism is a living thing that can carry out life processes by itself. Unicellular organisms are made up of just one cell that performs all the functions necessary for life. Unicellular organisms do not have levels of organization. Unicellular organisms need fewer resources and some can live in harsh conditions.

Detailed explanation-2: -The body of a multicellular organism, such as a tree or a cat, exhibits organization at several levels: tissues, organs, and organ systems. Similar cells are grouped into tissues, groups of tissues make up organs, and organs with a similar function are grouped into an organ system.

Detailed explanation-3: -“Unicellularity is clearly successful-unicellular organisms are much more abundant than multicellular organisms, and have been around for at least an additional 2 billion years, ” said lead study author Eric Libby, a mathematical biologist at the Santa Fe Institute in New Mexico.

Detailed explanation-4: -The unicellular organisms contain a single cell whereas the multicellular organisms contain multiple cells. Unicellular organisms conciliate all the cellular activities by a single cell, while multicellular organisms carry out specific cell activities through a well-defined group of cells.