Some Birds Follow Moving Swarms of Army Ants in the Tropics.As

question 17

Multiple Choice

Some birds follow moving swarms of army ants in the tropics.As the ants march along the forest floor hunting insects and small vertebrates,birds follow and pick off any insects or small vertebrates that fly or jump out of the way of the ants.This is an example of what kind of species interaction?

• A)competition
• B)consumption
• C)commensalism
• D)parasitism
• E)mutualism

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Definitions:

Predetermined Overhead Rate

An estimated overhead rate used to apply manufacturing overhead to products, calculated before the accounting period begins.

Direct Labor-Hours

The total hours worked by employees directly involved in the manufacturing process, used as a basis for allocating overhead costs.

Machine-Hours

A measure of the amount of time machines are operated during the production process, used for allocating costs or measuring productivity.

Markup

The additional sum included in the purchase price of products to account for overhead expenses and profit.