The Question is from neet-zoology , and it was created by the author BALASOURY

Question

Which theory arguments that life on earth came from outer space?

BALASOURY · Accepted Answer

## CORE INFORMATION
✓ **Answer**: B
## CONCEPT FRAMEWORK
	**Primary Concept**: Origin of Life
	**Related Topics**: Astrobiology, Evolution, Planetary Science
	**Prerequisites**: Basic understanding of scientific theories.
## SOLUTION PATHWAY
**Given Information**:
	The question asks about the theory that proposes life originated from outer space.
**Method & Steps**:
	1. Analyze each option and its associated theory.
	Reasoning: We need to identify the theory that specifically addresses extraterrestrial origins of life.
	2. Identify 'Panspermia' as the theory concerning life originating from space.
	Key Point: Panspermia suggests that life exists throughout the Universe and can be distributed via celestial bodies like asteroids, comets, etc.
	3. Confirm 'Panspermia' as the correct answer.
	Result: Panspermia
	Verification: The definition of Panspermia aligns with the question's requirement.
## OPTION ANALYSIS
[A] Abiogenesis :x: Abiogenesis deals with the natural process by which life arises from non-living organic compounds, but it doesn't specify an extraterrestrial origin.
[B] Panspermia ✓: This theory posits that life exists throughout the Universe and is distributed by space dust, meteoroids, asteroids, comets, planetoids, and also by spacecraft carrying unintended contamination by microorganisms.
[C] Endosymbiosis :x: Endosymbiosis explains the origin of eukaryotic cells from prokaryotic organisms, specifically the development of mitochondria and chloroplasts.
[D] Spontaneous Generation :x: This obsolete theory proposed that living organisms could arise from nonliving matter, like maggots from decaying meat. It has been disproven.
## LEARNING AIDS
	**Common Mistakes**:
		1. Confusing Abiogenesis with Panspermia: While both relate to the origin of life, Abiogenesis doesn't necessitate an extraterrestrial source.
		2. Misinterpreting Endosymbiosis: Endosymbiosis describes the evolution of eukaryotic cells, not the origin of life itself.
	**Quick Tips**:
		1. Remember 'Pan' in Panspermia refers to 'all' or 'everywhere', hinting at the universal distribution of life.
		2. Associate Panspermia with space travel and celestial bodies.

BALASOURY · Answer

Abiogenesis

BALASOURY · Answer

The correct Option is "Panspermia"

BALASOURY · Answer

Endosymbiosis

BALASOURY · Answer

Spontaneous Generation

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