Why must large organisms be multicellular?

Answer 1

Multicellular organisms require specialized organs and systems because in multicellular organisms, different jobs are done by different cells that are specialized, e.g. A blood cell carries oxygen. A nerve cell sends and receives signals.

In multicellular organisms different functions are divided among different cells. The cells in multicellular organisms are organized in ways the enables them to survive and reproduce. For any multicellular organism to survive, different cells must work together. The right type of cell must be in the right place to do the work that need to be done.

Answer 2

Bigger organisms get to eat smaller organisms, so there is some usefulness in being big, and you can't get very big without having more than one cell. From my perspective as a multicellular human being, it is good to be multicellular because it creates the possibility of intelligence and all that comes with it. The richness of human civilization would not exist without multicellular organisms.

Answer 3

Large organisms must be multicellular because a single cell would not be able to support the metabolic demands of a large body. By being multicellular, larger organisms can specialize cells for specific functions, such as nutrient absorption, movement, or reproduction, increasing their overall efficiency. Additionally, multicellularity allows for better coordination and communication among cells in a larger organism.

Answer 4

Simply because as organisms get bigger their surface area to volume ratio decreases. This means it becomes more and more difficult to get nutrients and excrete wastes on a cellular level.

Answer 5

People are multicellular because they have many cells in their bodies.

Answer 6

Macro-organisms are composed of many cells, therefore they are called multicellular organisms. Microorganisms are typically made up of only on cell.