For multicellular organisms (like us) cell division allows an organism to grow and develop from a single cell to trillions of cells, to repair and replace cells worn out and used up by everyday life, and in some cases, to make specialized cells for reproduction.
or, to make it more easy to understand, in multicellular living things, cell division is required for tissue repair and growth. :)
unicellurlar only one cell in the functions and multicellular multi cells in 2 functions IM pretty sure this is right! :))
cells in a multicellular organism have the ability to specialize in certain functions for the overall success of the organism. some genes will be expressed in some cells while other genes in other cells. this creates the difference between skin cells versus liver or blood cells. a unicellular organism must cover all the functions of an entire organism and all the necessary genes must be expressed plus all the functions of created and breaking down compounds necessary for growth, development and producing offspring.
1. Development from a fertilised cell ie Reproduction 2. Growth 3. Repair and replacement of worn out tissue
Binary Fission Binary Fission
unicellurlar only one cell in the functions and multicellular multi cells in 2 functions IM pretty sure this is right! :))
in unicellular organisms, only one cell performs all the functions of the body. On the other hand in multicellular organisms, there are specific cells that form a tissue and perform specific functions. So, multicellular organisms show division of labor and are more well defined.
REPAIR
Organ Systems Apply Differently To The Bodies Of Multicellular organisms
In unicellular organisms, a single cell performs all the basic functions such as respiration, movement, excretion, digestion, etc. But in multicellular organisms, cells are grouped to form tissues. These tissues are specialised to carry out a particular function at a definite place in the body. For example, the muscle cells form muscular tissues which helps in movement, nerve cells form the nervous tissue which helps in transmission of messages. This is known as division of labour in multicellular organisms. It is because of this division of labour that multicellular organisms are able to perform all functions efficiently.
Multicellular organisms grow through cell division. A multicellular organism's growth and development start with one cell, which then divides into two cells. The division will continue, with each division increasing by a factor of two.
A multicellular organism usually lives longer than a one cell organism. A one celled organism is limited to the life span of it's one cell. Different tissues in a multicellular organism perform different functions and new cells and tissues are added in these organisms by cell division hence life span in multicellular organisms is longer than unicellular organisms.
Growth or Injury.
cells in a multicellular organism have the ability to specialize in certain functions for the overall success of the organism. some genes will be expressed in some cells while other genes in other cells. this creates the difference between skin cells versus liver or blood cells. a unicellular organism must cover all the functions of an entire organism and all the necessary genes must be expressed plus all the functions of created and breaking down compounds necessary for growth, development and producing offspring.
Multicellular organisms grow through cell division. A multicellular organism's growth and development start with one cell, which then divides into two cells. The division will continue, with each division increasing by a factor of two.
In unicellular organisms, a single cell performs all the basic functions such as respiration, movement, excretion, digestion, etc. But in multicellular organisms, cells are grouped to form tissues. These tissues are specialized to carry out a particular function at a definite place in the body. For example, the muscle cells form muscular tissues which helps in movement, nerve cells from the nervous tissue which helps in transmission of messages. This is known as division of labour in multicellular organisms. It is because of this division of labour that multicelluler organisms are able to perform all functions efficiently.
1. Development from a fertilised cell ie Reproduction 2. Growth 3. Repair and replacement of worn out tissue