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Q5:
Find out through internet and popular science articles whether animals other than man has self-consciousness.
Solution :
Theoretical Framework of Self-Consciousness in Non-Human Species
Self-consciousness, within the context of evolutionary biology and comparative psychology, is defined as the capacity to recognize oneself as an individual entity distinct from the environment and other conspecifics. While historically considered a uniquely human trait, empirical evidence suggests a spectrum of cognitive complexity across the animal kingdom.
Step 1: The Mirror Self-Recognition (MSR) Test
The primary diagnostic tool for determining self-awareness in animals is the Gordon Gallup Jr. Mirror Test. The procedure is as follows:
- Phase A (Acclimation): An animal is exposed to a mirror to determine if it recognizes its reflection as a social stimulus (i.e., treating it as another individual).
- Phase B (Mark Test): While sedated or distracted, a mark of odorless, non-tactile paint or dye is placed on the animal’s body in a location only visible via the mirror.
- Phase C (Observation): The animal is returned to the mirror. If the subject uses the reflection to inspect or remove the mark from its own body, it demonstrates self-directed behavior.
Step 2: Analysis of Empirical Data across Taxa
Scientific literature indicates that self-recognition is not confined to the hominid lineage. The following table summarizes the confirmed and debated findings:
| Species | Status | Evidence Reference |
|---|---|---|
| Great Apes (Chimpanzees, Bonobos, Orangutans) | Confirmed | Gallup (1970) |
| Bottlenose Dolphins (*Tursiops truncatus*) | Confirmed | Reiss & Marino (2001) |
| Asian Elephants | Confirmed | Plotnik et al. (2006) |
| Eurasian Magpies | Confirmed | Prior et al. (2008) |
| Cleaner Wrasse (*Labroides dimidiatus*) | Debated | Kohda et al. (2019) |
Step 3: Evolutionary Biological Interpretation
The existence of self-consciousness in disparate taxa (mammals vs. birds vs. teleost fish) suggests convergent evolution [Per the Theory of Convergent Evolution]. The emergence of these high-order cognitive processes appears linked to:
- Social Complexity: The need to navigate complex hierarchies and maintain cooperative alliances requires a stable internal representation of the "self" versus the "other."
- Ecological Demand: High-order processing provides an advantage in niche environments where situational awareness and self-protection are survival imperatives.
Visual Representation: The Cognitive Spectrum
Step 4: Philosophical and Scientific Caveats
Critics, including those representing the behavioral school of psychology, argue that MSR success does not definitively prove "self-consciousness" in the subjective, phenomenological sense (i.e., qualia). It indicates an advanced ability to process mirror-based spatial information and body schema maintenance [Per the Embodied Cognition Framework].
Final Solution: Multiple non-human species, particularly Great Apes, cetaceans (dolphins), elephants, and certain corvids (magpies), demonstrate clear behavioral evidence of self-consciousness through the Mirror Self-Recognition (MSR) test, suggesting that self-awareness is a trait that has evolved independently in lineages with high levels of social and cognitive complexity.
More Questions from Class 12 Biology Evolution EXERCISES
- Q1: Explain antibiotic resistance observed in bacteria in light of Darwinian selection theory.
- Q1: Explain antibiotic resistance observed in bacteria in light of Darwinian selection theory.
- Q2: Find out from newspapers and popular science articles any new fossil discoveries or controversies about evolution.
- Q2: Find out from newspapers and popular science articles any new fossil discoveries or controversies about evolution.
- Q3: Attempt giving a clear definition of the term species.
- Q3: Attempt giving a clear definition of the term species.
- Q4: Try to trace the various components of human evolution (hint: brain size and function, skeletal structure, dietary preference, etc.)
- Q4: Try to trace the various components of human evolution (hint: brain size and function, skeletal structure, dietary preference, etc.)
- Q5: Find out through internet and popular science articles whether animals other than man has self-consciousness.
- Q6: List 10 modern-day animals and using the internet resources link it to a corresponding ancient fossil. Name both.
- Q6: List 10 modern-day animals and using the internet resources link it to a corresponding ancient fossil. Name both.
- Q7: Practise drawing various animals and plants.
- Q7: Practise drawing various animals and plants.
- Q8: Describe one example of adaptive radiation.
- Q8: Describe one example of adaptive radiation.
- Q9: Can we call human evolution as adaptive radiation?
- Q9: Can we call human evolution as adaptive radiation?
- Q10: Using various resources such as your school Library or the internet and discussions with your teacher, trace the evolutionary stages of any one animal, say horse.
- Q10: Using various resources such as your school Library or the internet and discussions with your teacher, trace the evolutionary stages of any one animal, say horse.
CBSE Solutions for Class 12 Biology Evolution
Chapters in CBSE - Class 12 Biology
- Reproduction in Organisms
- Human Reproduction
- Reproductive Health
- Principles of Inheritance and Variation
- Molecular Basis of Inheritance
- Human Health and Disease
- Strategies for Enhancement in Food Production
- Microbes in Human Welfare
- Biotechnology: Principles and Processes
- Biotechnology and Its Applications
- Organisms and Populations
- Ecosystem
- Biodiversity and Conservation
- Environmental Issues
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