Evidence for scavenging among our ancestors comes from: a) Studies of other scav

Question

Evidence for scavenging among our ancestors comes from: a) Studies of other scavengers. b) observations of other hunter - gathers. c) microscopic analysis of bone fragments. d) experiments in the wild. e) all of the above Conflict in social living a) is often destructive. b) opens a door to change. c) decreases as self-responsibility increases. d) all of the above e) none of the above. The stature of many mammals a) decreases as available resources decrease. b) a constant overtime. c) decreases when isolated. d) increases over time. e) a and c. Although both the genotype and phenotype are affected by environmental factors it is the ____ that is most directly tested by the environment. a) phenotype b) genotype c) blood type d) cultural type e) somatotype Bipedalism requires: a) a locking out knee joint. b) a bowel shaped pelvis. c) an "S': shaped spine. d) a valgus knee. e) all the above. The earliest manufacture of stone tools dates to: a) 6 MYA. b) 3-2.5 MYA. c)2 MYA. d) 1.8 MYA. e) none, of the above.

Explanation / Answer

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68. Ans-a)

a) Conflict is a competition in some personal and hostile forms. When a part of society does not change with other parts of society then it leads to war.

b) It does not open a door for positive changes because it is a part of eliminating the weak competitors.

c) It arises from a clash within groups and society and sometimes between groups and society.

d) Not all of above

70. Ans-a

a) Phenotype is a physical characteristic of human being like height, skin colour, hair colour , behaviour etc which change continually throughout the life of an organism and affected by environmental factors. Eg- In case of twins, they have different skin colour.

b) Genotype is a heritable genetic identity which comes from parents to offspring and remain same throughout the life time and cannot changed by any environmental effect.

c) Blood type does not change by environmental factor.

d) Cultural type is type of phenotype.

d) Somatotype is a classification of body structure, appearance and development which include in phenotype.

71.Ans- e

a, d) Femur is the longest bone in human and slants inwards from the hip. This leads to knee joints closer together.

b) In human pelvis is bowl shaped which help to increases the surface area for the attachment of large buttock muscles.

c) Human has an S-shaped curve spine which   provide support and balance

d) valgus knee is found in which knee angle is inward

72. Ans- e

The earliest manufacture of stone tools developed about 2.6 million years ago.

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