The Shape of the Beak of a Hummingbird (Very Long

question 67

Multiple Choice

The shape of the beak of a hummingbird (very long and skinny) and that of a finch (short and fat) is controlled by the same set of genes. Which of the following could account for the differences between these two bird beaks?

• A) Apoptosis occurs in the beak of the finch, but not in the beak of the humming bird.
• B) Although development is controlled by the same genes, the genes produce different proteins and those proteins cause development to occur in different ways.
• C) The hummingbird retains stem cells for a longer period of time during development than does the finch.
• D) The genes involved in determining beak shape stay on for different lengths of time in each bird.

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Definitions:

Wisconsin Milk Market

Refers specifically to the dairy industry and marketplace within the state of Wisconsin, known for its significant contribution to the United States' milk production.

Total Producer Surplus

The total benefit that producers receive from selling a good or service, measured as the difference between the market price and the minimum price producers are willing to accept.

Caitlin's Producer Surplus

The difference between what a producer (in this case, Caitlin) actually receives for selling a good and the minimum they would be willing to accept.

Producer Surplus

The difference between what producers are willing to accept for a good or service and what they actually receive, measured by the area above the supply curve and below the market price.