The Minimum Stimulus Required to Initiate a Nerve Impulse or Action

question 1

Multiple Choice

The minimum stimulus required to initiate a nerve impulse or action potential is called a(n) _____ stimulus.

• A) subliminal
• B) subthreshold
• C) action
• D) threshold
• E) impulse

Understand the various forms of reproductive isolation mechanisms and their definitions.

Identify the consequences of hybridization between different species.

Recognize the role of temporal, habitat, and mechanical isolation in preventing gene flow between species.

Distinguish between prezygotic and postzygotic barriers and their significance in speciation.