Q.The theory of spontaneous generation stated that:
The theory of spontaneous generation held that living organisms could arise directly from non-living matter — maggots from rotting meat, mice from grain — without the need for parent organisms.
The theory of spontaneous generation was one of the oldest explanations for the origin of life, deeply rooted in everyday observation and accepted for centuries. People noticed that maggots appeared on decaying meat, frogs seemed to emerge from muddy ponds after rain, and mice were found in stores of grain. The natural conclusion, given the limited tools and understanding of the time, was that life could spring forth directly from non-living matter under the right conditions.
This wasn't a fringe idea. Aristotle endorsed it, and it persisted well into the seventeenth century. The logic seemed sound: if you left meat out, flies appeared; if you stored grain carelessly, rodents materialized. No one saw the tiny eggs being laid or the hidden pathways animals used. The gap between observation and reality was filled by the assumption that life assembled itself spontaneously from lifeless substances.
The theory began to crumble when scientists started designing careful experiments. Francesco Redi in the 1660s showed that maggots did not arise from meat itself but from eggs laid by flies — when he covered the meat with muslin, no maggots appeared. Later, Louis Pasteur delivered the decisive blow in the 1860s with his elegant swan-neck flask experiment. He demonstrated that microorganisms in broth came from airborne particles, not from the broth spontaneously generating life. When air could enter but dust and microbes were trapped in the curved neck, the broth remained sterile indefinitely.
Spontaneous generation is distinct from abiogenesis, the scientific hypothesis that life originated from non-living chemistry billions of years ago under early Earth conditions. Spontaneous generation claimed life arose routinely and quickly from non-living matter; abiogenesis refers to a singular, ancient event involving complex chemistry over vast timescales.
Looking at the options, the theory specifically claimed that life arose from non-living things — rotting matter, mud, grain — without any living parent required. It did not say life came only from living forms, nor did it propose some mysterious third source beyond living and non-living.
The theory of spontaneous generation stated that life can arise from non-living things only — option (C) — a belief disproven by experiments showing that life comes from pre-existing life.
Unlock everything free for 14 days
- Full step-by-step solutions
- Concept-first explanations
- Methods, shortcuts & mistakes
- PYQ mapping + timed mock tests
Full access for 14 days. No credit card required.