In Your Biology Lab,you Use a Stereoscopic Microscope to Observe

question 38

Multiple Choice

In your biology lab,you use a stereoscopic microscope to observe a living animal that uses only one opening to both take in its food,and also eject its waste products after having eaten and digested the food for metabolism.This body arrangement of the animal is which of the following?

• A) incomplete digestive tract
• B) gastrovascular cavity
• C) complete digestive tract
• D) complete digestive tract and a gastrovascular cavity
• E) incomplete digestive tract and a gastrovascular cavity

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Definitions:

Fixed Costs

Costs that do not vary with the level of production or sales, such as rent, salaries, and insurance premiums.

Variable Costs

Costs that change in proportion to the level of goods or services that a business produces.

Profit

The financial gain realized when the amount of revenue gained from a business activity exceeds the expenses, costs, and taxes involved in sustaining the activity.

Variable Cost

A cost that depends on the level of production chosen.