Over Geologic Time, the Concentration of O₂ in Earth's Atmosphere

question 158

Multiple Choice

Over geologic time, the concentration of O₂ in Earth's atmosphere has increased.However, at the end of the _______ period, the O₂ concentration decreased significantly and was associated with _______.

• A) Devonian; rapid evolution of lineages
• B) Carboniferous; mass extinctions
• C) Permian; mass extinctions
• D) Cretaceous; rapid evolution of lineages
• E) Cretaceous; mass extinctions

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Definitions:

Sharpe Measure

A ratio used to evaluate the risk-adjusted return of an investment portfolio, by comparing its excess returns to the volatility of those returns.

Active Portfolio Managers

Investment professionals who make regular buy, hold, and sell decisions in an attempt to outperform standard benchmarks.

Active Portfolio

An investment portfolio actively managed by a portfolio manager or investor aiming to outperform a benchmark index through regular buying and selling of securities.

Systematic Risk

This refers to the inherent risk that affects the entire financial market or a whole market segment, unpreventable through diversification.