![Page 1: Studying Life 1-3. Biology Means study of life Science that seeks to understand the living world In order to be considered alive, organisms must meet](https://reader036.vdocuments.us/reader036/viewer/2022082713/5697bff11a28abf838cbb515/html5/thumbnails/1.jpg)
Studying Life
1-3
![Page 2: Studying Life 1-3. Biology Means study of life Science that seeks to understand the living world In order to be considered alive, organisms must meet](https://reader036.vdocuments.us/reader036/viewer/2022082713/5697bff11a28abf838cbb515/html5/thumbnails/2.jpg)
Biology
• Means study of life
• Science that seeks to understand the living world
• In order to be considered alive, organisms must meet 8 criteria
![Page 3: Studying Life 1-3. Biology Means study of life Science that seeks to understand the living world In order to be considered alive, organisms must meet](https://reader036.vdocuments.us/reader036/viewer/2022082713/5697bff11a28abf838cbb515/html5/thumbnails/3.jpg)
1. Made up of cells
• Cells - smallest unit of life
• Unicellular - made of 1 cell
• Multicellular - made of several cells
![Page 4: Studying Life 1-3. Biology Means study of life Science that seeks to understand the living world In order to be considered alive, organisms must meet](https://reader036.vdocuments.us/reader036/viewer/2022082713/5697bff11a28abf838cbb515/html5/thumbnails/4.jpg)
2. Reproduction
• Produce new organisms through a process called reproduction
• Asexual - single parent, divides in 2, creates identical offspring
• Sexual - 2 parents, genetically different offspring
![Page 5: Studying Life 1-3. Biology Means study of life Science that seeks to understand the living world In order to be considered alive, organisms must meet](https://reader036.vdocuments.us/reader036/viewer/2022082713/5697bff11a28abf838cbb515/html5/thumbnails/5.jpg)
3. Based on a Genetic Code
• Offspring inherit traits from parents
• Directions for inheritance carried in DNA - genetic code
![Page 6: Studying Life 1-3. Biology Means study of life Science that seeks to understand the living world In order to be considered alive, organisms must meet](https://reader036.vdocuments.us/reader036/viewer/2022082713/5697bff11a28abf838cbb515/html5/thumbnails/6.jpg)
4. Growth and Development
• All living things grow during at least part of their lives
• Some, like bacteria, just grow in size
• Multicellular organisms go through stages of development
![Page 7: Studying Life 1-3. Biology Means study of life Science that seeks to understand the living world In order to be considered alive, organisms must meet](https://reader036.vdocuments.us/reader036/viewer/2022082713/5697bff11a28abf838cbb515/html5/thumbnails/7.jpg)
5. Need for Material & Energy
• Organisms need materials and energy to grow, develop, and reproduce
• Get energy from photosynthesis or consuming energy stored from photosynthesis
• Metabolism
![Page 8: Studying Life 1-3. Biology Means study of life Science that seeks to understand the living world In order to be considered alive, organisms must meet](https://reader036.vdocuments.us/reader036/viewer/2022082713/5697bff11a28abf838cbb515/html5/thumbnails/8.jpg)
6. Response to Environment
• Organisms detect and respond to stimuli from environment
• External stimuli - light & temp.
• Internal stimuli - blood sugar level
![Page 9: Studying Life 1-3. Biology Means study of life Science that seeks to understand the living world In order to be considered alive, organisms must meet](https://reader036.vdocuments.us/reader036/viewer/2022082713/5697bff11a28abf838cbb515/html5/thumbnails/9.jpg)
7. Maintaining Internal Balance
• Organisms must keep internal temp. and water content fairly constant to survive
• Homeostasis - maintaining internal balance– Shiver, sweat
![Page 10: Studying Life 1-3. Biology Means study of life Science that seeks to understand the living world In order to be considered alive, organisms must meet](https://reader036.vdocuments.us/reader036/viewer/2022082713/5697bff11a28abf838cbb515/html5/thumbnails/10.jpg)
8. Evolution
• As a group, organisms evolve, or change over time
• Ex. - fish bony plates to scales
![Page 11: Studying Life 1-3. Biology Means study of life Science that seeks to understand the living world In order to be considered alive, organisms must meet](https://reader036.vdocuments.us/reader036/viewer/2022082713/5697bff11a28abf838cbb515/html5/thumbnails/11.jpg)
Levels of Organization
BiosphereEcosystem
CommunityPopulation
OrganismGroups of cells Cells
Molecules