Let's Say You Are Conducting Research to Test the Idea

question 12

Multiple Choice

Let's say you are conducting research to test the idea that regular flossing reduces the incidence of gum disease. In this hypothetical design, what is the independent variable?

• A) gum disease
• B) flossing frequency
• C) the severity of the gum disease
• D) both a and b are independent variables

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Definitions:

Evolve

To evolve is for a species to undergo gradual changes in its genetic makeup over generations, leading to adaptation and variation within the population.

Cerebral Cortex

The outer layer of the brain in vertebrates, responsible for complex brain functions such as thought, memory, emotion, and motor control.

Tetrapods

The superclass of animals with four limbs, including amphibians, reptiles, birds, and mammals, as well as their extinct relatives.

Optic Tectum

A part of the brain found in the midbrain of vertebrates, involved in visual processing.