IntroductionIntroduction

• BiologyBiology: : The Science of Our LivesThe Science of Our Lives

• Biology literally means "the study of life".Biology literally means "the study of life".

Definition of BiologyDefinition of Biology

• The science of lifeThe science of life; that branch of knowledge which treats ; that branch of knowledge which treats of living matter as distinct from matter which is not living; of living matter as distinct from matter which is not living; the study of living tissuethe study of living tissue. . It has to do with the origin, It has to do with the origin, structure, development, function, and distribution of structure, development, function, and distribution of animals and plantsanimals and plants..

Importance of biologyImportance of biology TheTheThe biological disciplines imply a significant The biological disciplines imply a significant responsibility for the protection and the welfare of all responsibility for the protection and the welfare of all the living species the living species

The study on the origin of diseases and plagues is also The study on the origin of diseases and plagues is also answerable by means of Biology, for example the answerable by means of Biology, for example the etiology of cancer, infections, functional problems, the etiology of cancer, infections, functional problems, the damage to fruits, the pathologies of farm animals, damage to fruits, the pathologies of farm animals, plants, trees, etc plants, trees, etc

The food that we consume are materials produced by The food that we consume are materials produced by living beings, the Biology studies the living beings and living beings, the Biology studies the living beings and the processes implied in the production of those the processes implied in the production of those nutritional substancesnutritional substances..

The Biology covers the study of all the living beings and The Biology covers the study of all the living beings and their interactions into the biospheretheir interactions into the biosphere. .

WHAT IS WHAT IS LIFELIFE??

The interaction of charged The interaction of charged particles, electrons and protons, particles, electrons and protons, through uncharged particles, through uncharged particles, expressly through photons, expressly through photons, determines the positions and determines the positions and momentums of the energy during momentums of the energy during the performance of the Proton the performance of the Proton Motive ForceMotive Force

Characteristics of living Characteristics of living

thingsthings Living things have a variety of common Living things have a variety of common

characteristics characteristics

Organization Organization HomeostasisHomeostasisAdaptation Adaptation Reproduction and heredity Reproduction and heredity Growth and development Growth and development Energy acquisition and release Energy acquisition and release Detection and response to stimuliDetection and response to stimuliInteractionsInteractions

Levels of OrganizationLevels of Organization • BiosphereBiosphere:: The sum of all living things taken The sum of all living things taken

in conjunction with their environment in conjunction with their environment • EcosystemEcosystem: : The relationships of a smaller The relationships of a smaller

groups of organisms with each other and groups of organisms with each other and their environmenttheir environment..

• CommunityCommunity: The relationships between : The relationships between groups of different species.groups of different species.

• Species:Species: Groups of similar individuals who Groups of similar individuals who tend to mate and produce viable, fertile tend to mate and produce viable, fertile

offspringoffspring..• PopulationsPopulations: Groups of similar individuals : Groups of similar individuals

who tend to mate with each other in a who tend to mate with each other in a limited geographic area. limited geographic area.

• Organ SystemOrgan System: (in multicellular organisms). : (in multicellular organisms). A group of cells, tissues, and organs that A group of cells, tissues, and organs that perform a specific major function. perform a specific major function.

• cardiovascular system functions in cardiovascular system functions in circulation of blood. circulation of blood.

• Organ: (in multicellular organisms). A group Organ: (in multicellular organisms). A group of cells or tissues performing an overall of cells or tissues performing an overall function. function.

• Tissue: (in multicellular organisms). A group Tissue: (in multicellular organisms). A group of cells performing a specific function. of cells performing a specific function.

• CellCell:: The fundamental unit of living thingsThe fundamental unit of living things..

• OrganelleOrganelle: : A subunit of a cell, an organelle is A subunit of a cell, an organelle is involved in a specific subcellular function involved in a specific subcellular function