Explain Why the Presence of Many Archaea Has Been Confirmed

question 15

Essay

Explain why the presence of many Archaea has been confirmed only by community sampling of rRNA genes and not by culture in the laboratory. How has metagenomics helped to solve this problem?

---

Definitions:

Allowance for Doubtful Accounts

An estimation of the amount of accounts receivable that may not be collected, which is used as a contra asset to adjust the net value of accounts receivable.

Direct Write-off Method

An accounting approach where uncollectable debts are directly written off against income at the time they are deemed non-recoverable.

Percentage of Sales Method

A financial forecasting model that bases future sales, expenses, and other financial elements as a percentage of sales revenue.

Adjusting Entries

Journal entries made at the end of an accounting period to allocate income and expenditures to the period in which they actually occurred.