6(a) What is acclimatization ? Discuss adaptive responses to high altitude and cold climate.
20 Marks
Syllabus: Paper I > 9.7 Man's physiological responses to environmental stresses
Physical and Cultural Characteristics of Homo erectus — 2021 Paper I
Question · 2021 · Paper I · 20 Marks
What are the physical and cultural characteristics of Homo erectus ? Discuss its phylogenetic status.
Model Answer
VAID ICSApproach
- Demand of Question: Describe the physical and cultural features of Homo erectus and assess its evolutionary position.
- Structuring the Response: Physical features → cultural characteristics → fossil distribution → phylogenetic debate.
- Key Dimensions to Cover: Cranial/post-cranial anatomy, Acheulean, fire, subsistence, dispersal, ergaster–H. erectus debate and relationship with later Homo.
Model Answer
Introduction
Homo erectus was a widespread and long-lived species of Homo, appearing by about 1.9 million years ago and surviving in Java until roughly 117,000–108,000 years ago. Eugène Dubois discovered the first specimen at Trinil, Java, in 1891, naming it Pithecanthropus erectus (1894). It marks an important evolutionary stage combining increased brain size with an essentially modern terrestrial body plan.
Physical Characteristics
Cranial Features
- Cranial capacity: about 750–1250 cc, average around 1000 cc.
- Long, low cranial vault with receding forehead.
- Thick cranial bones and post-orbital constriction.
- Prominent, usually continuous supraorbital torus.
- Occipital torus posteriorly.
- Sagittal/frontal keel, especially in Asian specimens.
- Greatest cranial breadth positioned relatively low.
- Large, robust face with some prognathism.
- Chin absent.
- Teeth smaller than in australopithecines and earlier hominins.
Post-cranial Features
- erectus possessed nearly modern human body proportions:
- Long legs and relatively shorter arms.
- Fully terrestrial bipedal locomotion.
- Pelvis and lower limbs suited for efficient long-distance walking and probably running.
- Adult stature approximately 145–185 cm.
- African populations often had tall, narrow bodies suitable for hot, open environments.
KNM-WT 15000, the Nariokotome or Turkana Boy, dated to about 1.6 Ma, demonstrates long legs, a narrow trunk and efficient terrestrial locomotion.
Larger body + Longer legs + Larger brain + Smaller teeth → More human-like adaptive pattern
Cultural Characteristics
Stone-tool Technology
- erectus is strongly associated with the Acheulean tradition, present in Africa by about 1.76–1.7 Ma.
Major tools included:
- Bifacial handaxes
- Cleavers
- Choppers
- Flakes and scrapers
Acheulean implements exhibit greater symmetry, planning and standardisation than earlier core-flake technologies.
However, Acheulean technology was not universal. Dmanisi and several East Asian assemblages are mainly associated with simpler core-and-flake or chopper traditions.
Subsistence
- erectus probably followed a broad hunter-scavenger-gatherer economy, consuming:
- Animal foods and marrow
- Wild fruits and berries
- Tubers and other plant foods
- Eggs and opportunistically available resources
Its larger body, brain and mobility are associated with access to a more diverse and higher-quality diet, although increased meat consumption alone cannot explain its evolutionary transformation.
Use of Fire
Evidence for burning occurs within the temporal range of H. erectus. Sites such as Zhoukoudian have traditionally been associated with fire for warmth, protection and food processing.
However, habitual control of fire by early H. erectus remains debated; therefore, it is preferable to refer to increasing evidence for fire use, rather than universal mastery.
Mobility and Dispersal
One of its greatest achievements was large-scale geographical expansion. H. erectus was the first hominin known to disperse widely beyond Africa, reaching western Eurasia, East Asia and Southeast Asia.
Africa → Georgia/Western Eurasia → China → Java
Major Fossil Representatives
| Region | Important Fossils/Sites |
| East Africa | Koobi Fora, Olduvai, Nariokotome |
| Georgia | Dmanisi |
| China | Zhoukoudian, Lantian |
| Indonesia | Trinil, Sangiran, Ngandong |
The classical Java Man and Peking Man, earlier classified as Pithecanthropus and Sinanthropus, were later included within Homo erectus.
Phylogenetic Status
The phylogenetic position of H. erectus is important but taxonomically debated.
Traditional View
Traditionally, it was placed in the sequence:
Earlier Homo (H. habilis) → H. erectus → Middle Pleistocene Homo → H. sapiens
Thus, H. erectus was regarded as an important intermediate evolutionary grade between early and later members of Homo.
Homo ergaster–Homo erectus Debate
Two major interpretations exist:
Lumper View:
African and Asian forms constitute one geographically variable species—Homo erectus sensu lato.
Splitter View:
Early African specimens are classified as Homo ergaster, while more specialised Asian fossils constitute Homo erectus sensu stricto.
Susan Antón, in “Natural History of Homo erectus” (2003), highlighted substantial geographical variation and distinct regional morphologies, particularly in Southeast Asia.
Ancestor of Homo sapiens?
The older idea that all H. erectus populations directly evolved into H. sapiens is oversimplified.
Early African H. erectus/H. ergaster populations are considered more relevant to the ancestry of later Homo, whereas some Asian populations developed distinctive regional features and persisted for long periods.
The Ngandong population of Java, surviving until approximately 117–108 ka, demonstrates the prolonged persistence of regional H. erectus lineages.
Earlier Homo
↓
H. erectus sensu lato
↓
Dispersal and regional differentiation
↙︎ ↘︎
African populations Asian H. erectus
↓ ↓
Contribution to later Homo Long-lived regional lineages
Conclusion
Homo erectus represents a major stage of hominisation, combining increased encephalisation and modern body proportions with improved technology, wider subsistence and unprecedented dispersal. Phylogenetically, it is best regarded not as a uniform “missing link,” but as a widespread and variable evolutionary lineage whose early populations played a crucial role in the emergence of later Homo.
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UPSC Anthropology Optional 2021 — Paper I
28 questions1(a) Animism and Deep Ecology
10 Marks150 words
Syllabus: Paper I > 5. Religion > Forms of religion > Animism
Syllabus: Paper I > 12. Applications of Anthropology > Anthropology of sports; nutritional anthropology
1(d) “The bio-cultural approach is the hallmark of Biological Anthropology.” Explain.
10 Marks150 words
Syllabus: Paper I > 1.3 Main branches of Anthropology > Biological Anthropology
Syllabus: Paper I > 11.3 Biological and socio-ecological factors influencing fecundity and fertility
Syllabus: Paper I > 7. Culture, language and communication > Social context of language use
Syllabus: Paper I > 9.4 Chromosomes and chromosomal aberrations in man
2(b) Elucidate the concept of “thick description” of Clifford Geertz with a suitable example.
15 Marks
Syllabus: Paper I > 6. Anthropological Theories > Interpretive Anthropology > Geertz
5(d) Descent Groups
10 Marks150 words
Syllabus: Paper I > 2.5 Kinship > Descent groups
Syllabus: Paper I > 12. Applications of Anthropology > Applied human genetics > Paternity diagnosis
Syllabus: Paper I > 1.8(b) Cultural Evolution: broad outlines of prehistoric cultures > Neolithic
Syllabus: Paper I > 9.3 Mendelian population and Hardy-Weinberg law > Evolutionary mechanisms
1(c) Historical Particularism and Franz Boas
10 Marks150 words
Syllabus: Paper I > 6. Anthropological Theories > Historical Particularism (Boas)
5(a) Human adolescent growth spurt
10 Marks150 words
Syllabus: Paper I > 10. Human growth and development > Stages of growth > Adolescence
5(c) Is race a valid and biologically meaningful concept ?
10 Marks150 words
Syllabus: Paper I > 9.5 Race and racism > Biological basis of racial classification
Syllabus: Paper I > 2.5 Kinship > Alliance theory; structuralism
Syllabus: Paper I > 2.4 Family > Types and classification of the family
1(b) Marriage Regulations and Alliance Theory
10 Marks150 words
Syllabus: Paper I > 2.3 Marriage > Rules of marriage; alliance theory
5(e) Modes of Subsistence
10 Marks150 words
Syllabus: Paper I > 3. Economic Organization > Modes of subsistence
Syllabus: Paper I > 1.6 Phylogenetic status, characteristics and distribution > Homo erectus
Syllabus: Paper I > 10. Human growth and development > Ageing and senescence > Theories of ageing
3(a) How do political organisations of simple societies establish power, authority and legitimacy ?
20 Marks
Syllabus: Paper I > 4. Political Organization and Social Control > Power, authority and legitimacy
Syllabus: Paper I > 1.2 Relationships with other disciplines: Social Sciences
5(b) The losses and gains of erect posture
10 Marks150 words
Syllabus: Paper I > 1.5 Characteristics of Primates > Skeletal changes due to erect posture
1(e) Thermoluminescence (TL) dating
10 Marks150 words
Syllabus: Paper I > 1.8(a) Chronology: relative and absolute dating methods
Syllabus: Paper I > 8.3 Research Methods: Tools of data collection
Syllabus: Paper I > 1.8(b) Cultural Evolution: broad outlines of prehistoric cultures > Mesolithic
Syllabus: Paper I > 2.2 The Nature of Society > Social stratification