60. Biological and social nature of man. Human races.

Question 1

Human races: large group of people with common source areal, common origin, similar morphological and physiological traits -> give fertile generation

Answer 1

Human races: large group of people with common source areal, common origin, similar morphological and physiological traits -> give fertile generation

Question 2

System of signalling, exchange of information and experiences:

• sound (oral) communication - articulate speech
• improved human brains - higher nerve activity
• consciousness, will, feelings, knowledge
• technical revolution

Answer 2

System of signalling, exchange of information and experiences:

• sound (oral) communication - articulate speech
• improved human brains - higher nerve activity
• consciousness, will, feelings, knowledge
• technical revolution

Question 3

Genetic changes - 15-20 million years less natural selection

Answer 3

Genetic changes - 15-20 million years less natural selection

Question 4

Why dark skin is better in hot climates:

• production of melanin in skin - epithelial cells
• helps protect against damage of UV

Answer 4

Why dark skin is better in hot climates:

• production of melanin in skin - epithelial cells
• helps protect against damage of UV