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BSC 1005 Exam 1 Complete Answers 7 Properties of Life 1. Order: Organisms exhibit complex but ordered organization. 2. Regulation of Internal Environment: Maintaining a stable internal environment, such as temperature and pH. 3. Growth and Development: Organisms grow and develop according...

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  • August 14, 2024
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BSC 1005 Exam 1 Complete Answers


7 Properties of Life

1. Order: Organisms exhibit complex but ordered organization.

2. Regulation of Internal Environment: Maintaining a stable internal environment, such as temperature
and pH.

3. Growth and Development: Organisms grow and develop according to specific instructions coded in
their DNA.

4. Energy Processing: Energy is transformed from one form to another to power the organism’s
activities.

5. Response to the Environment: Organisms respond to environmental stimuli.

6. Reproduction: The ability to produce new individuals, either asexually or sexually.

7. Evolutionary Adaptation: Populations evolve adaptations over generations.



Theory of Evolution

- Change Through Time: Refers to genetic changes in a population across generations.

- Unifying Theory of Biology: Connects various observations from the natural world and explains
relationships and diversity among living organisms.



Life's Hierarchy of Organization

1. Biosphere: Global ecological system integrating all living beings and their relationships.

2. Ecosystem: A community of living organisms and their physical environment interacting.

3. Community: A group of interdependent organisms living in a shared environment.

4. Population: A group of organisms of the same species in a specific area.

5. Organism: An individual living entity that can react to stimuli, reproduce, grow, and maintain
homeostasis.

6. System: A group of organs working together to perform complex functions.

7. Organ: Structures composed of two or more tissue types that perform a specific function.

8. Tissue: A group of similar cells that work together to perform a specific function.

9. Cell: The smallest unit of life, possessing the properties of life.

, 10. Organelle: Specialized structures within a cell that perform distinct processes.

11. Molecule: Two or more atoms bonded together, forming the smallest structural unit of a substance.



Natural Selection

1. Mechanism of Evolution: A process through which evolution occurs.

2. Favorable Inherited Traits: Individuals with beneficial traits are more likely to survive and reproduce.

3. Variation in Populations: Natural selection acts on variations within a population.



Types of Biodiversity

1. Genetic Diversity: The variety of genes within a species, indicating variations among individuals.

2. Species Diversity: The variety and number of species present in a habitat or geographic area.



Levels of Biological Organization

- Level 1: Molecule

- Composed of two or more atoms held together by chemical bonds; the smallest unit.



- Level 2: Organelles

- Functional structures within cells (e.g., ribosomes).



Key Organelles:

- Ribosomes: Sites of protein synthesis.

- Nucleus: Control center of the cell where DNA is stored and initial transcription occurs.

- Chloroplasts: Convert sunlight into energy through photosynthesis.

- Mitochondria: Powerhouse of the cell; converts energy from food into usable energy.



- Level 3: Cells

- The smallest units exhibiting living properties, forming the basis of the cell theory.



- Level 4: Tissues

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