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
Meiosis is important because during sexual reproduction, it ensures that all produced organisms have the correct number of chromosomes. It is also responsible for producing genetic variations during the process of recombination, and it repairs some genetic defects.Full Answer >
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 >
The three main reasons why cell division is important in organisms are reproduction, repair and growth, according to "McDougal Littell Science Cells and Heredity." Cell division is necessary in order for life to continue.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 >