Evolution of Food-Sharing Behavior



9 Questions

What is the basis for kin selection models?

What do reciprocal models generate?

What do tolerated theft models seek to explain?

What do costly signaling models explain?

What do group cooperation models suggest?

What is food-sharing?

What is a benefit of sharing, according to the text?

Which animals exhibit reciprocal sharing behaviors?

What has food-sharing been theorized as in early human evolution?


Evolutionary biologists have developed various theoretical models to explain the evolution of food-sharing behavior among humans and other animals.

Kin selection models are based on the concept of kin selection and altruism, which assumes that greater resource-accumulation increases reproductive fitness.

Reciprocal models expand on kin-selection models and generate expectations of when and how a recipient of food from a donor will share food in a future interaction with that donor.

Tolerated theft models seek to explain why in some hunter-gatherer societies, scrounging behavior is tolerated by other members of a group.

Costly signaling models explain why certain individuals tend to target difficult-to-acquire foods that sometimes produce less optimal yields.

Group cooperation models suggest that groups often target foods that pose some level of difficulty in their acquisition.

Food-sharing is a form of trade-based reciprocal altruism where privately owned food is used to reward labor.

Sharing seems to be better at reducing risk than changing the diet breadth.

Chimpanzees and other nonhuman primates exhibit reciprocal sharing behaviors.

Food-sharing has been theorized as an important development in early human evolution.

Natural selection will also favor the development of ways of determining kin from non-kin and close kin from distant kin.

Greater imbalances in the quantities shared between close kin are expected than those shared with non-kin or distantly related individuals.


Test your knowledge of the evolution of food-sharing behavior in humans and animals with this informative quiz! From kin selection models to costly signaling models, this quiz covers the theoretical models that evolutionary biologists have developed to explain food-sharing behavior. Learn about the benefits of food-sharing, its role in early human evolution, and the different types of food-sharing observed in nonhuman primates. Whether you're a biology student or just curious about animal behavior, this quiz is sure to challenge and inform.

Ready to take the quiz?

Start Quiz