Table of Contents
- 1 How are organisms and cells different?
- 2 Why do unicellular single-celled organisms need cell division?
- 3 What is the difference between single-celled organisms and multicellular organisms ability to survive?
- 4 How are cells composed of more than one cell?
- 5 Are there any unicellular organisms in the world?
- 6 Why do muscle cells have more mitochondria than other cells?
How are organisms and cells different?
A cell is the smallest unit of a living thing. A living thing, whether made of one cell (like bacteria) or many cells (like a human), is called an organism.
Why do unicellular single-celled organisms need cell division?
Cell division serves as a means of reproduction in unicellular organisms through binary fission. For growth to occur in living organisms, the number of cells have to increase through cell division until it reaches its maximum size. The human body also repairs injuries by means of cell division.
What is the difference between single-celled organisms and multicellular organisms ability to survive?
Single-celled organisms are able to carry out all the processes of life without help from other cells. Multicellular organisms carry out their life processes through division of labor. They have specialized cells that do specific jobs.
Which one of the following is unicellular organism?
Unicellular organisms include bacteria, protists, and yeast.
How are unicellular organisms different from multicellular organisms?
Unicellular organisms are made up of only one cell that carries out all of the functions needed by the organism, while multicellular organisms use many different cells to function. Unicellular organisms include bacteria, protists, and yeast.
How are cells composed of more than one cell?
Multicellular organisms are composed of more than one cell, with groups of cells differentiating to take on specialized functions. In humans, cells differentiate early in development to become nerve cells, skin cells, muscle cells, blood cells, and other types of cells. One can easily observe the differences in these cells under a microscope.
Are there any unicellular organisms in the world?
Although all cells have organelles in common, the number and types of organelles present reveal how the cell functions. There are many types of unicellular organisms in the world, including protists like this one, which feed mainly on diatoms, amoebas, bacteria, and algae.
Why do muscle cells have more mitochondria than other cells?
For example, muscle cells have more mitochondria than most other cells so that they can readily produce energy for movement; cells of the pancreas need to produce many proteins and have more ribosomes and rough endoplasmic reticula to meet this demand.