The Common Origin of Toes of Land-Dwelling Mammals, Fingers of Humans

question 26

Multiple Choice

The common origin of toes of land-dwelling mammals, fingers of humans, and wings of bats is an example of

• A) homology.
• B) vestigial organs.
• C) natural selection.
• D) origin of species.

---

Definitions:

Total-Cost Curve

A graph that shows the total cost of producing different quantities of a good or service.

Marginal-Cost Curve

A graphical representation that shows how the cost of producing one additional unit of a good varies as the production volume changes.

Average-Fixed-Cost Curve

A graphical representation that shows the fixed costs of production per unit of output declining as the quantity of output increases.

Marginal-Cost Curve

A graphical representation that shows the cost of producing one more unit of a good.