At which point on the phylogeny shown did the amnion FIRST appear? 
Definitions:
Cash Sales
Cash sales refer to transactions where payment is made in cash at the time of sale, without deferral.
Petty Cash Account
A small amount of cash kept on hand for minor or incidental expenses, managed through a specified fund.
Purpose
The reason for which something is done or created or for which something exists.
General Journal Entry
A general journal entry is a record of financial transactions that includes details such as date, accounts impacted, amounts, and a brief description of the transaction.
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