Introduction To Biology PDF

Section 1: Introduction to Biology All living things share the characteristics of life. K W L What I Know What I Want to Find Out What I Learned Essential Questions What is biology? What are possible b...

Section 1: Introduction to Biology All living things share the characteristics of life. K W L What I Know What I Want to Find Out What I Learned Essential Questions What is biology? What are possible benefits of studying biology? What are the characteristics of living things? Copyright © McGraw-Hill Education Introduction to Biology Vocabulary Review New environment biology organism organization growth development reproduction species stimulus response homeostasis adaptation Copyright © McGraw-Hill Education Introduction to Biology The Science of Life Biology comes from the Greek bio, meaning life, and from logos, meaning study Study the origins and history of life and once-living things Study the structures of living things Study how living things interact with one another Study how living things function Copyright © McGraw-Hill Education Introduction to Biology  What do biologists do? Study the diversity of life Research diseases Develop technologies Improve agriculture Preserve the environment Copyright © McGraw-Hill Education Introduction to Biology The Characteristics of Life 1. Made of one or more cells 2. Displays organization 3. Grows and develops 4. Reproduces 5. Responds to stimuli 6. Requires energy 7. Maintains homeostasis 8. Adaptations evolve over time An organism is anything that has or once had all these characteristics Copyright © McGraw-Hill Education Introduction to Biology The Characteristics of Life Made of one or more cells Cells are the basic unit of structure and function in all living things. Living things can be unicellular (one cell) or multicellular (many cells). Copyright © McGraw-Hill Education Introduction to Biology The Characteristics of Life Displays organization Living things display organization, which means they are arranged in an orderly way. Single cells: contains organized functional structures Multicellular: Specialized cells organized into tissues Tissues are organized into organs Organ systems work together to support an organism Copyright © McGraw-Hill Education Introduction to Biology  The Characteristics of Life Grows and develops Most organisms begin as a single cell. The addition of mass to an organism, often in the form of new cells and structures, is called growth. The process of natural changes over the lifetime of an organism is called development. Copyright © McGraw-Hill Education Introduction to Biology The Characteristics of Life Reproduces Reproduction = the production of offspring Organisms that can breed with one another and produce fertile offspring are know as a species. Reproduction is not essential for the survival of an individual, but it is essential for the continuation of the species. Copyright © McGraw-Hill Education Introduction to Biology The Characteristics of Life Responds to stimuli Anything that is part of the internal or external environments and causes a reaction by the organism is called a stimulus. The reaction to a stimulus is a response. Copyright © McGraw-Hill Education Introduction to Biology The Characteristics of Life Requires energy Living things get their energy from food. Most plants and some unicellular organisms use light energy from the Sun to make their own food. Organisms that cannot make their own food get energy by consuming other organisms. Copyright © McGraw-Hill Education Introduction to Biology The Characteristics of Life Maintains homeostasis Regulation of an organism’s internal conditions to maintain life is called homeostasis. If anything happens within or to an organism that affects its normal state, processes to restore the normal state begin. Copyright © McGraw-Hill Education Introduction to Biology The Characteristics of Life Adaptations evolve over time An adaptation is any inherited characteristic that results from changes to a species over time. Adaptations enable species to survive and pass on their genes to the next generation. Adaptations are usually developed in response to an environmental factor. Copyright © McGraw-Hill Education Introduction to Biology Review Essential Questions What is biology? What are possible benefits of studying biology? What are the characteristics of living things? Vocabulary biology development response organism reproduction homeostasis organization species adaptation growth stimulus Copyright © McGraw-Hill Education Introduction to Biology