Final answer:
The collective term for cows and bulls on a farm is 'cattle.' They are an important part of farm operations and have significant cultural and historical roles.
Step-by-step explanation:
The collective term for cows and bulls, especially on a farm, is cattle. Cattle are domesticated animals that farmers may raise for various purposes such as producing milk, as part of farm work, or for meat production. On a farm, you will find that cattle are integral to many operations, from dairy farming to beef production, and the management of these animals can range from open grazing to structured feedlots. Anthropologists have studied the cultural and historical importance of cattle around the world, including their roles in religious rituals, bull sports as rites of passage, and their economic impact on agriculture.