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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The Answer of 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:

Describe How Mean and Variance of a Trait Value Change