BackNeedham vs. Spallanzani definitions
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1/15BackSkip to main contentBackSpontaneous Generation
A disproven concept suggesting that living organisms can arise from nonliving matter under certain conditions. Sterilization
A process intended to eliminate all forms of microbial life from a substance, often requiring sufficient heat exposure. Contamination
The unintended introduction of microbes into a sterile environment, often compromising experimental results. Broth
A nutrient-rich liquid medium used to support the growth of microorganisms in laboratory experiments. Cork
A porous material used to seal flasks, which can allow microbes to pass through and contaminate contents. Melted Glass Seal
A method of closing flasks by fusing glass, creating an airtight barrier that prevents microbial entry. Microbial Growth
The increase in number of microorganisms, often visible as cloudiness or colonies in a nutrient medium. Experimental Setup
The specific arrangement and procedures used in scientific investigations, crucial for obtaining valid results. Biogenesis
A principle stating that life arises only from pre-existing life, not from nonliving material. Porous Material
A substance containing tiny holes that permit the passage of air or microbes, potentially leading to contamination. Cooling Period
The interval after heating during which a substance returns to room temperature, often a window for contamination. Skepticism
A critical attitude or doubt regarding experimental conclusions, often driving further scientific inquiry. Vital Force
A hypothesized essential element, such as oxygen, once believed necessary for spontaneous generation. Custom Flask
A specially designed container used in experiments to control variables like air exposure and contamination. Physiologist
A scientist specializing in the study of biological functions and processes in living organisms.
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