Nolan Is Running a Research Study in Which Current Participants

question 56

Multiple Choice

Nolan is running a research study in which current participants are asked to recruit their friends for participation. What type of sampling is he using?

• A) cluster random sampling
• B) simple random sampling
• C) convenience sampling
• D) snowball sampling

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Definitions:

Dominant Species

In a community, a species that as a result of its large biomass or abundance exerts a major influence on the distribution of populations of other species.

Common Species

A term referring to species that are frequently encountered within their habitat or geographical area, often well-adapted to living in human-altered environments.

Community

An assemblage of different populations that live together in a defined area and interact with each other.

Keystone Species

Species that have a disproportionately large effect on their natural environment relative to their abundance, often influencing both ecosystem structure and biodiversity.