If Atmospheric CO₂ Concentrations Increase Twofold or More, How Will

question 30

Multiple Choice

If atmospheric CO₂ concentrations increase twofold or more, how will plants be affected, disregarding any changes in climate?

• A) All plants will experience increased rates of photosynthesis.
• B) C₃ plants will have faster growth; C₄ plants will be minimally affected.
• C) C₄ plants will have faster growth; C₃ plants will be minimally affected.
• D) C₃ plants will have faster growth; C₄ plants will have slower growth.
• E) Plant growth will not be affected because atmospheric CO₂ concentrations are never limiting for plant growth.

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Definitions:

Classical Conditioning

A learning process that occurs when two stimuli are repeatedly paired together; an unconditioned stimulus and a neutral stimulus, eventually causing the neutral stimulus to elicit the conditioned response alone.

Behavior Controller

A tool or method used to modify or manage actions and reactions in individuals or animals, often for therapeutic or training purposes.

Punishment

A consequence given in response to an action or behavior that is deemed unacceptable, with the intent to reduce or eliminate that behavior.

Sporadic

Occurring occasionally, irregularly, or in scattered instances without a pattern or predictable rhythm.