You Learned How Freshwater Stickleback Populations Have Lost Their Body

question 24

Essay

You learned how freshwater stickleback populations have lost their body armor through positive selection of a low-armor Eda allele, which is found at low frequency in marine populations. Draw (a) a phylogenetic tree that would support the hypothesis that the low-armor phenotype arose once and then spread throughout freshwater populations and (b) a phylogenetic tree that would support the hypothesis that the phenotype arose independently multiple times in freshwater populations.

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Definitions:

Notes Payable

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Historical Cost Principle

A financial reporting rule mandating that assets are documented and presented at their initial acquisition price.

Balance Sheet Reporting

The process of disclosing a company's financial health at a given moment by listing its assets, liabilities, and equity.

Financial Reporting

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