The First Plants to Produce Seeds Evolved During Which Time

question 3

Multiple Choice

The first plants to produce seeds evolved during which time period?

• A) Mesozoic era
• B) Cenozoic era
• C) Jurassic period
• D) Devonian period
• E) Cretaceous period

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Definitions:

Independent Variable

The variable in an experiment that is manipulated by the researcher to observe its effects on the dependent variable.

Experimental Group

In research, a group of subjects who are exposed to the variable under investigation to assess its effect.

Potential Confound

A variable that could distort the results or conclusions of a study or experiment by intermingling its effects with those of the variables of interest.

Background Music

Music that is played in the background and is not meant to be the main focus of an audience.