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

     

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  
                             

   

                                                                                                                 

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