You Are Preparing a Presentation on the Evolution of Giraffes

question 18

Multiple Choice

You are preparing a presentation on the evolution of giraffes. Which of the following statements best points out how natural selection was involved in the formation of the long necks of giraffes?

• A) Long-necked giraffes did not reproduce with shorter-necked giraffes.
• B) Giraffes grew long necks from stretching to reach leaves on trees.
• C) Giraffes with longer necks survived because they were better suited to the environment.
• D) Long-necked giraffes were able to run faster to avoid predation.
• E) Short-necked giraffes had the advantage but went extinct due to a major disaster.

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Definitions:

Standard Deviation

A statistical measure that quantifies the variation or dispersion of a set of numerical values, often used to assess the risk associated with a particular investment.

Risk-Free Rate

The theoretical return on an investment with no risk of financial loss, typically represented by the yield on government bonds from stable countries.

Perfectly Negatively Correlated

Describes two variables that move in opposite directions; if one increases, the other decreases.

Global Minimum Variance Portfolio

An investment portfolio that is designed to have the lowest possible risk (variance) for the expected return, part of modern portfolio theory.