Keystone Species

question 13

Multiple Choice

Keystone species

• A) appear to be common in terrestrial systems, but not in aquatic ones.
• B) appear to be common in both terrestrial and aquatic systems.
• C) appear to be common in aquatic systems, but not in terrestrial ones.
• D) by definition, cannot occur in aquatic systems.
• E) by definition, cannot occur in terrestrial systems.

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Definitions:

Accounts Receivable

This refers to the money owed to a company by its customers for goods or services that have been delivered but not yet paid for.

Contra Expense Account

An account that is offset against an expense account on the income statement, effectively reducing the total expense reported.

Expense Account

A ledger account that records transactions related to costs incurred by a business in the process of earning revenue.

Adjusting Entry

An accounting record made at the close of an accounting period that assigns income and expenses to the correct period.