Why Did It Take So Long for Eukaryotes to Evolve

question 27

Multiple Choice

Why did it take so long for eukaryotes to evolve after photosynthetic prokaryotes began releasing O₂ into the atmosphere?

• A)O₂ moves slowly through larger cells, so higher concentrations of O₂ had to become available before eukaryotic cells could be efficiently supported.
• B)The ability to use O₂ had to evolve before cells could survive in an O₂-rich atmosphere.
• C)The ability to break down the waste products of O₂ use had to evolve before cells could use it to create energy.
• D)Enough prokaryotes had to become extinct to provide eukaryotes with a niche to occupy before they could evolve.

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Definitions:

Minimum-variance Portfolio

An investment portfolio designed to have the lowest possible risk (variance) for its expected return.

Global Minimum Variance Portfolio

An investment portfolio strategy that seeks to minimize volatility by allocating assets in a way that produces the lowest possible variance.

Standard Deviations

A statistical measure that quantifies the dispersion or variance of a set of data points from their average, widely used in the finance sector to gauge the volatility of investment returns.

Systematic Risk

The overall market risk that cannot be diversified away by holding a wide range of asset classes.