A CO₂ Gradient Between the Inside and Outside of a Leaf

question 61

Multiple Choice

A CO₂ gradient between the inside and outside of a leaf is maintained during photosynthesis because

• A)energy is expended by the plant to maintain the CO₂ gradient.
• B)the CO₂ concentration outside of the leaf is always increasing.
• C)the CO₂ concentration in the mesophyll is constantly decreasing.
• D)the stomata close whenever more CO₂ is needed.

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Definitions:

Obsessional Themes

Recurrent and persistent thoughts, impulses, or images experienced as intrusive and unwanted, often causing significant anxiety or distress, characteristic of disorders like obsessive-compulsive disorder.

Contamination

The presence of unwanted substances or impurities in a material, environment, or natural resource, compromising its quality or safety.

Worry

A cognitive process involving the repetitive contemplation of future events that may result in anxiety or stress.

Order/Symmetry

The desire or compulsion to arrange objects in a precise, orderly, or symmetrical manner, often observed in individuals with obsessive-compulsive disorder.