Why Was the Field Experiment by Krebs and Colleagues So

question 27

Multiple Choice

Why was the field experiment by Krebs and colleagues so important to our understanding of predator and prey dynamics?

• A) Because the researchers were able to manipulate three trophic levels simultaneously in the field and on a large scale
• B) Because the researchers were able to manipulate three trophic levels simultaneously without the influence of complicating factors such as weather cycles
• C) Because the researchers were able to test for the effects of the three trophic levels one at a time, in three separate experiments
• D) Because the researchers were able to manipulate three trophic levels as well as normally complicating factors such as weather and genetics

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Definitions:

Existential Instantiation

A principle in logic and philosophy that allows from the acknowledgment of the existence of at least one instance of a particular predicate.

Universal Instantiation

A logical rule that states if a property or relation holds for all members of a class or domain, then it holds for any specific member of that class or domain.

Universal Instantiation (UI)

A principle in logic stating that what is true of everything in a particular class must also be true of any specific member of that class.

Simplification (Simp)

The process of making something less complicated or easier to understand.