Final answer:
Prejudice can be based on sexism and ageism. Sexism involves valuing one sex over another, leading to gender role expectations and institutional discrimination. Ageism results in stereotypes and discrimination towards individuals based on their age.
Step-by-step explanation:
Prejudice can indeed be based on social differences, such as sexism and ageism. Sexism is a form of prejudice where one sex is valued over the other, leading to discrimination at both micro and macro levels, including institutional discrimination. This is evident in gender role expectations and employment opportunities where women may face barriers in male-dominated fields. Ageism, on the other hand, involves prejudiced attitudes towards people based on their age, often resulting in stereotypes that older adults are slow and incompetent, which can lead to discriminatory practices against older individuals in various aspects of life.