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 in Cells
Some bacteria manufacture and absorb their own food, while others must consume substances like living organisms or decaying material through their cell walls. Bacteria break down food in a process called respiration, which for some strains of bacteria requires oxygen to complete.Full Answer >
Cellular division is important because without these changes, most organisms would die. All life begins and thrives through cellular processes, and cell division is the process of development and transformation. According to HowStuffWorks.com, “In multicellular organisms, cell division is responsible for the growth of the organism and the replacement of old or worn-out cells.”Full Answer >
Arizona State University states that meiosis is how sexually reproducing organisms, including humans, produce gametes, or sex cells. Gametes are fundamentally different from the body, or somatic, cells of sexually reproductive organisms because gametes only have half of the genetic code in their nucleus. When two different gametes fuse and produce a zygote, their half-complements of genetic material combine to form a complete genome with the full complement of chromosomes.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 >