Sarah Is So Excited That a Robin Has Built a Nest

question 234

Multiple Choice

Sarah is so excited that a robin has built a nest right outside her office window.She watches daily as the parents take turns sitting on the three eggs,until they finally hatch.Now she sees three little beaks point up at the sky every time one of the parents arrive.But one day,Sarah notices only two little beaks are waiting to be fed,and she wonders what happened to the third bird.In what way would this example help Darwin explain the diversity of life on earth?

• A) Not all animals that are born will survive long enough to reproduce.
• B) Selective breeding in animals can lead to dramatic changes in appearance.
• C) Fossil Evidence Indicates Subtle Changes In Species Over Time.
• D) Similarities among organisms show how they're related.

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Definitions:

Optimal Prices

The price point that maximizes a firm's profits or achieves the best balance between sales volume and profit margins.

Economies of Scale

The financial benefits that companies gain as a result of their size, production volume, or operational scope, where the cost for each unit of production typically falls as the scale expands.

Third-Degree Price Discrimination

A pricing strategy where different prices are charged to different groups of consumers for the same product, based on elasticity of demand.

Monopoly Power

The ability of a single seller to set prices and control the market for a good or service without significant competition.