Thursday, August 8, 2013

Unit01


Introduction to Biology


                              Biology              

     BIOS+LOGIC
The word bios is refers to as livings and logic is as thinking of logical way.

Biology is a subject  which is study of livings in logical way.


This diagrams will give you some ideas about it. 




   Biological diversity
   


Life on earth  for over  3.5 billion  years
30 million species of animals and plants in the world
There is a dynamic relationship  between the world of life and the inanimate world
  
    
     Human body and            functions
         









 •Appreciate the organization of the human bod
 •How systems within body are  interconnected
 •Structure is related to function



Management of natural resources and      environment                                     

 Natural resources are limited with the growth of human population

 There is a threat of depletion of natural resources

Destruction of ozone layer in the atmosphere








Global warming increasing concentration of CO2

Acid rain


Pollution of rivers and under ground water supplies leading to a dearth in  drinking water in the future




Sustainable food production

    









  



Three people are added to the  world’s population each second


The current human population of 6 billion is expected to double in less than 40 years

Survival of man kind,sustainable  food production is  necessary 

Production of high yield varieties  of  plants and animals


Development of disease  resistant varieties                                           

Improved methods of post  harvesting technology


   




Causes and effects of diseases

    







Scientists are currently  working on cures for diseases

Cancer –leading cause of death in some countries are not fully understood

Aids  - serious and growing   health problems world wide

Malaria-can kill over 3 million  people per year in  undeveloped  countries

TB - Tuberculosis (TB) is an infection, primarily in the lungs (apeneumonia), caused by bacteria called Mycobacterium tuberculosis
It is spread usually from person to person by breathing infected air during close contact.



Living organisms show a wide range of variation .

     Size

     Shape

     Form

     Distribution



Shape  - Organisms are diverse in shape





Form - Uni cellular or multi cellular



 
            Paramecium                      Euglena                           Amoeba
     
Giant Perennial  Kelp : Macracystis
Blade length 10" to 15".Plants up to 200' or longer. This is our largest kelp;  it can grow more than 18* a day. Vast forests grow off the coast of southern California. Algin is extracted from the kelp,  then used in food products, drugs, and the processing of textiles, beer, paints, ice cream, and paper products.Kelp is a multi cellular protist



Characteristics of living organisms



                                                   







Difference between livings and non livings


  • Many  non living entities may have one or more of these characteristics but not all of them.
  •  eg: Crystals grow ,  waves move


  • Only living organisms display all these characteristics simultaneously or at some point during their life cycle