Answer to Question 1
When there is competition for scarce resources (females), the result is confrontational behavior and potentially serious violence. This pattern is known as the young male syndrome. It may partly be the consequence of long-ago evolutionary pressures and partly a response to situational demands. Although the pattern of behavior may be coded in every man's makeup, it is likely to appear among men whose present situations predict reproductive failure, e.g., unmarried and unemployed males.
Answer to Question 2
A
Roots of the keystone species hypothesis: does a higher proportion of predators in diverse communiti
Adult male tortoise, South Africa
These adolescents have just graduated and look forward to moving on from high school and adolesence
Adult respiratory distress syndrome
The neural pathway responsible for the production and learning of song in the male canary.
Cataracts seen in a child with congenital rubella syndrome.