What is an organism made up of one or few cells?
prokaryotes like amoeba and paramoecium.
In an organism, a genetic code is made by the cells, but in that genetic sequence, if one or more letters are change, replaced, or deleted, then those cause mutations in the organism In an organism, a genetic code is made by the cells, but in that genetic sequence, if one or more letters are change, replaced, or deleted, then those cause mutations in the organism
well cells make up each living organism along with atoms , therfore we are made of cells. cells along with atoms they are the basic building blocks of life. organisms come from them A Cell is the smallest thing that can truly be considered alive. "Organism" just means one body, one living thing. You are an organism. A tree is an organism. A bacterium is an organism. Some organisms are made up of many cells…
A cell on it's one is simply a cell. A collection of cells that perform the same job are a collection of tissues. A collection of tissues which perform different jobs but work together is called an organ. It depends what type of cell you are talking about. A cell only on it's own can be an organism because it relies on diffusion to get nutrients and essential substances. On the other hand, millions of…
Animals and plants are made of billions of cells because if there was only one or two cells the nutrients would take years to get to the nucleus and the cell/nucleus/organism would die. Same with the oxygen that the organism absorbed. Since the plant/animal is made of billions of cells the nutrients and oxygen get to the nucleus quickly.
unicellular is when an organism is made of just one cell. all the processes and functions are preformed in that one cell. multicellular is wen an organism is made of many cells. the cells works together to function. Multicellular organisms are much more complex because their cells make up many different systems.
Because a single cell isn't very complex. The more cells an organism has, the more it can specialize it's cells, such as all the specialized cells that make up your brain, stomach, skeleton, muscles, etc. An organism that is made up of only one cell, that one cell has to do everything that each of our specialized cells do.
No. Every organism is made of cells, and cells have "organelles". An organ, however, is composed of tissues, which are composed of many cells, and therefor it is not possible for a single celled organism (plant, animal, fungus, etc) to have organs. (If you want to get confused, read about sea-sponges.)
Cells are always the smallest unit in thinking about cells, tissues, organs, organ systems, and the organism. From smallest to largest, the order is: cells, which specialize and make specific types of tissues tissue, made up of specialized cells organs, made up of specialized tissues organ systems, made up of one or more organs that are specialized to do a specific function the entire organism, which includes all of the organ systems. See question: What…
There is no particular trend. For example a many-cells organism like humans have different cells than plants. (Cell walll, vacuole wise) While both differ from one-celled organisms like fungi, virus, and bacteria. Moreover, all the three are different. Fungi have a cell wall made of chitin while bacteria have a cell wall made of murein and a virus doesn't even gave a cell wall.
No; a multicellular organism is composed of cells, but not unicellular organisms. A unicellular organism is a species on its own, containing all necessary functions in one cell (e.g. E. coli, a bacterium). The cells in a multicellular organism make up larger systems with interactions between cells, often resulting in more complex functions.