Describe How Mean and Variance of a Trait Value Change

question 7

Short Answer

Describe how mean and variance of a trait value change in the absence of an evolutionary trend as a lineage diversifies.Use +,-,or = to indicate an increase,a decrease,or no change,respectively.You can use one,two,or all of the symbols to describe the possible changes in both mean and variance.Mean:
Variance:

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Definitions:

Forward Exchange Contract

A financial agreement to exchange a specified amount of one currency for another currency at a future date and at a predetermined exchange rate.

Futures Contract

A standardized legal agreement to buy or sell something at a predetermined price at a specified time in the future, often used as a financial instrument for hedging or speculation.

Option Contract

A contract which gives the holder the right, but not the obligation, to buy or sell an underlying asset at a specified price within a specified time.

Financial Instruments

Contracts that give rise to both a financial asset of one entity and a financial liability or equity instrument of another entity.