Cows, buffaloes, elephants, monkeys, dogs and cats are all examples of multicellular organisms. Humans are the most complex of all multicellular organisms. All such organisms have billions of cells, tissues and different organ systems in the body.Know More
All multicellular organisms may be seen with the naked eye, as they are large. Multicellular organisms have evolved from unicellular organisms. They have specialized cells for performing different functions. The cells of the heart are different from the cells of the liver and the brain.
As opposed to multicellular organisms, there are unicellular organisms, such as amoeba, paramecium, viruses of various kinds and bacteria. They do not have a well-defined organ structure or organ systems within their bodies.Learn more about Cells
Cells are the most basic building blocks of all organisms. All living organisms are composed of at least one cell, and complex organisms such as humans are made up of trillions of cells.Full Answer >
Cells are called the building blocks of life because they are the basic unit for all living organisms, and must be present for life to exist. Plants and animals have trillions of cells, while protists have only one cell, yet protists are still considered to be living organisms.Full Answer >
The cellular basis of life is called the cell theory, which states that the cell is the basic functional unit of all living organisms. The cell theory also states that the activity of an organism depends on its cells and that reproduction has a cellular basis.Full Answer >
Osmoregulation is an important process in both plants and animals as it allows organisms to maintain a balance between water and minerals at the cellular level despite changes in the external environment. Osmoregulators take up both minerals and water from the environment and have methods of expelling what they do not need and conserving what is in short supply.Full Answer >