Parasitism Is One of the Most Successful Life Strategies Ever

question 28

Multiple Choice

Parasitism is one of the most successful life strategies ever to evolve. Which of the following is consistent with this finding?

• A) Parasites do not generally kill their hosts, thus they can feed on the same host throughout the host's normal life span and do not have competition from decomposers.
• B) Parasites, unlike predators, feed on almost all the tissues of their host.
• C) Parasites generally kill their host and can feed for a very long time because they are much smaller than their host.
• D) Parasites almost always predigest their hosts' tissues and, therefore, spend less energy and require fewer structural adaptations.

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Definitions:

Standard Quantity

The preset amount of materials or inputs theoretically required to produce a single unit of product under normal operating conditions.

Materials Price Variance

The difference between the actual cost of materials used in production and the standard cost of those materials.

Direct Materials

Raw materials that are directly traceable to the finished product and constitute a significant part of its costs.

Variable Overhead Spending Variance

The difference between actual variable overhead costs incurred and the expected (standard) costs based on the actual level of production activity.