Which of the Following Best Matches the Description

question 14

Multiple Choice

Which of the following best matches the description?
-Organisms that live on the bottom of marine or freshwater ecosystems.

• A)phytoplankton
• B)littoral zone
• C)desert
• D)pioneer community
• E)grassland
• F)boreal forest
• G)pelagic
• H)tundra
• I)none of above
• J)benthic
• K)deciduous forest
• L)biochemical oxygen demand
• M)periphyton
• N)marsh
• O)savanna
• P)euphotic

---

Definitions:

Independent Variable

In experimental and statistical research, the variable that is manipulated or changed to observe its effect on a dependent variable.

Manipulated

Altered or controlled in a deliberate way, often to achieve a specific outcome or effect in research or other contexts.

Constant

A quality, value, or quantity that remains unchanged or stable within a given context or over time.

Non-Experimental

Research methods that do not involve manipulating variables to determine effects but instead observe naturally occurring relationships.