Podcast
Questions and Answers
Which of the following is NOT a characteristic of life?
Which of the following is NOT a characteristic of life?
- Use energy
- Ability to reproduce
- Growth and development
- Stay in one place (correct)
Homeostasis refers to the ability of an organism to react to external stimuli.
Homeostasis refers to the ability of an organism to react to external stimuli.
False (B)
What is biogenesis?
What is biogenesis?
Life from life
An organism that makes its own food is called an ______.
An organism that makes its own food is called an ______.
Match each term with its correct definition.
Match each term with its correct definition.
Flashcards
Biogenesis
Biogenesis
The theory that living organisms arise from pre-existing living organisms. It's the foundation of modern biology and explains how life continues on Earth.
Abiogenesis
Abiogenesis
The theory that living organisms can arise from non-living matter. It's a discredited theory, but historically important.
Unicellular
Unicellular
Organisms made up of only one cell. These are very small and often microscopic.
Multicellular
Multicellular
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Homeostasis
Homeostasis
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Study Notes
Characteristics of Life Review
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Matching
- Redi: Disproved spontaneous generation by showing maggots didn't spontaneously arise from meat
- Needham: Performed an experiment that seemed to support spontaneous generation, but his methods weren't rigorous.
- Spallanzani: Repeated/re-designed Needham's experiment to eliminate potential contamination issues, disproving spontaneous generation.
- Pasteur: Conducted experiments using swan-necked flasks to further solidify the rejection of spontaneous generation
- Cell: The basic unit of life, made of one or more cells
- Autotroph: Organism that creates its own food
- Multicellular: Living organism comprised from multiple/more cells
- Metabolism: Chemical processes that occur within an organism
- Unicellular: Living organism comprised of only one cell
- Biogenesis: The creation of living organisms from other living organisms
- Abiogenesis: The mistaken/unsupported idea that life can arise from non-living matter (spontaneous generation)
- Asexual reproduction: Creation of offspring from one parent.
- Heterotroph: Organisms that get energy from eating other organisms.
- Homeostasis: Maintaining stable internal conditions
- Response: An organism's reaction to a stimulus
- Sexual reproduction: Creation of offspring from two parents
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List the five characteristics of life
- Cell
- Senses
- Use energy
- Reproduction
- Growth and development
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Identify the stimulus & response
- Example A: Stimulus: Dog feeling hot. Response: Dog moves to shade.
- Example B: Stimulus: Squirrel is being chased by cat. Response: Squirrel climbs a tree.
Definitions
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Definition of a living organism: A stable internal condition, combined chemical processes, and behavior taken by an organism in response to stimuli
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Meaning of a living organism: An organism made up of one or more cells, capable of reproduction, growth, response, and metabolism.
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