Question

why multicellular organisms like humans and elephant cannot grow as a single large cell and perform all functions through it​

Answer 1

A single cell taken from a multicellular creature's tissue cannot live under natural conditions as a unicellular organism because all cells in multicellular animals are specialized, that is, they are designed to perform a specific purpose within a larger, more complicated organism.

Multicellular Organisms:

• Multicellular organisms are made up of more than one cell, with differentiated groups of cells performing specific roles.
• Early in development, cells in humans specialize to become nerve cells, skin cells, muscle cells, blood cells, and other types of cells.
• A multicellular tissue, organ, or organism is one that is made up of many cells.
• Animals, plants, and fungi are all multicellular animals with diverse cells specialized for different activities.

Division of labor:

• Labor is considered to be divided into multicellular organisms since each cell is allocated a unique duty.
• A single cell in a unicellular creature is in charge of all life activities.
• This is referred to as the cellular level of organization.
• This can also be seen in certain primitive multicellular creatures.
• Every organelle in the cell serves a distinct purpose.
• The plasma membrane, for example, regulates the entry and exit of essential chemicals; chloroplasts generate food; ribosomes aid in protein synthesis, and mitochondria turn glucose into energy.
• This demonstrates that a cell has a division of labor.

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Answer 2

Answer:

The organisms are basically divided into two types- unicellular and multicellular. Unicellular organisms like Amoeba, and Paramecium perform simple tasks and do not have complex systems to absorb food or grow or perform various biological functions whereas multicellular organisms have millions of cells because these cells form tissue and then organs and then organ systems.

Coming to your question, It would not be possible for Organisms like Elephants and Humans to perform complex biological activities with just one cell because different groups of cells perform different dedicated tasks. For Ex- Nerve cells or Neurons form the Nervous system, Cardiac tissue or cells form the Heart, and Nephrons or Kidney cells form the Urinary System.

Mammals have evolved in the process of evolution, so a single cell can't be enough to hold such large bodies.

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