biological organization - medlepius

                                         biological organization
It is not a single stage it comprises of different stages and those stages are described below
biological organization is defined as hierarchy of complex biological structures that defines life and different aspects of life it includes following stages 

  • atomic and subatomic level
  • molecular level
  • cellular level 
  • tissue level  
  • organ level  
  • organ system 
  • whole organism or individual
  • population 
  • community
  • biosphere or biome

                                                        all of the organisms whether it is living or non living is made up of atoms and subatomic particles  like electron proton neutron and more subatomic particles like these

                                                in living organisms elements do not occur in isolated form so they combine with each other through covalent or ionic bonding to form a stable form known as the molecules the molecules that occur
 in living organisms are bio molecules such as carbon dioxide water and many more
molecules are of two type that are

micro molecules
*they are usually with low molecular weight 
*they are mostly inorganic in nature
*examples of them are water carbon dioxide acid bases salts 
*they are small in size and are often used for energy requirements such as ATP
they are simple and monomeric 
macro molecules
*they are with high molecular weight
*they are mostly organic in nature
*they are insoluble in water so they are used to form cellular membranes
*examples of them are lipids proteins carbohydrates and mores things like them

different micro and macro molecules combines with each other to form the function and structural unit of life which is know as the cell it is the smallest unit of life that carries out all the activities of life 
different cells have different function such as
xylem cells responsible for conduction of water and minerals 
phloem cells responsible for conduction of food material 
muscle cells responsible for movement
nerve cells responsible for conduction of nerve impulses

different cells having same function combine with each other in the form of lose sheets and bundles to form a structure known as tissues that have a common function such that they have a division of labor in them such that different cells have different function 
glandular tissue are responsible for secretions
gastric tissues are responsible gastric juice
nerve tissues are responsible nerve impulse

              different tissues having same function combine with each other to form specific structure know as organ such as a organ carries a specific function such as
stomach is an organ that has a function of digestion of food such that it is made up of two types of cells that are gastric cells that secretes gastric juice and the muscular cells that mix the food with  the gastric juice and move it to the posterior end

                           different organ in organism work together to work with each other to carry out a common function is know as the organ system such as digestive system respiratory system nervous system organ system in plants is less complex than the organ system in animals in plants we might talk about roots shoots leaves flowers

                                                   all of the organs and organ system in a living organism work to to form a whole organism or an individual such as whole organism is a independent unit in which different organs and organ system work together such as common example
if a man engaged in hard work

  • his heart rate is increased
  • his blood supply is increased
  • there occurs a hormonal change to deal with the condition
  • his rate of respiration increases
  • his digestion is promoted

in plants the coordination between different parts of body is brought about by only change of hormones where as in the animal the coordination between different organs is brought by nervous system endocrine system 

                            it is defined as a group of organisms of same specie living in a same place at a same time and interacting with each other is known as the population such as number of rats in a rice field or no of students in a class it also have some attributes such as

  • gene flow 
  • gene frequency 
  • age distribution 
  • population pressure 
  • population density

                                it is defines as number of organisms of different species living with reach other at a same time in a same place is know as the community
it is also defined as the dynamic collection of organisms
such as as lake or a forest 
in them organisms interact with different ways 

                                        biosphere is defines as the area of the earth that is covered by the organisms
where as biome is defined as a large regional community primarily determine by climate such that the major type of plant in a biome determines other type of plants and animal example of the are 

  • desert 
  • grasslands 
  • tropical forest 
  • tundra etc




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