At Night,faint Objects Are Best Seen When Not Looked at Directly.What

question 67

Multiple Choice

At night,faint objects are best seen when not looked at directly.What is the basis of this phenomenon?

• A)Rhodopsin is transported away from the fovea at night.
• B)Cis-retinal builds up in the fovea at night,and is degraded during the day.
• C)Cone photoreceptors are most sensitive in dim light,and few cones are present in the fovea.
• D)Rod photoreceptors are most sensitive in dim light,and few rods are present in the fovea.

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Expenses that do not change with the level of production or sales over a short period, such as rent and salaries.

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The quantity of products sold or services rendered at which total revenues equal total costs, resulting in no net loss or gain.

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