Study of Biology

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What is Biology?Biology

Living things are called

Organisms include

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All Living Things Share Common Characteristics

1. Basic Unit is the 2. They 3. All Based On Universal

Genetic Code4.

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Common Characteristics5. Obtain & Use Materials &

5. To Their Environment

6. Maintain A 7. AS A GROUP, Living

Things , That Is They Change Over Time

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All Organisms are made of Cells

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Facts About Cells Cells are the smallest living unit of an

organism Organisms are Grouped by their

Number of Cells Unicellular Organisms

- Living Organism Made Up Of One Cell Multicellular Organisms

- Living Organism Made Up Of Many,

Specialized Cells

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Organisms Reproduce to Pass on their Genetic Traits

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Two Types of Reproduction

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Involves 2 parentsEgg fertilized by sperm to make a ZYGOTEOffspring DIFFERENT from parents

Two Types of Reproduction

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Involves a single organism or cellCell dividesOffspring IDENTICAL to parent

Cells Have a Genetic Code

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Genetic CodeDNA ( ) carries the genetic code for all organisms

contain DNA

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Organisms Grow & Develop

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Growth & Development

Organisms by producing MORE CELLS & by cell ENLARGEMENTOrganisms as they mature into an adult organism

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Cells Require Food & Energy

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Food Requirements

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-can make their own food

Example: plants

Food Requirements can NOT make

their own foodThey must consume other

organisms eat plants eat meat eat plants &

animals

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Organisms Respond to Stimuli

Organisms to (Temperature, Water, Food Supplies, etc.)

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Homeostasis Keeping The Internal Environment

(Homeostasis) Of The Cell or Organism Within The Ranges Required For Life

Stable internal conditions of

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Living Things Evolve (Not Individuals) Change Over Time In Order To Survive Within Changing Environments.Fossil records show changes in groups of organisms

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Life is Organized on Several Levels

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Levels Atoms Molecules Organelles Cells – life starts here Tissues Organs System Organism

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LevelsPopulationCommunityEcosystemBiosphere

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