Examlex
After dark,the majority of light sensing in the retina is by __________ which do not differentiate colors.
Supply
Supply is the total amount of a specific good or service available to consumers, and it increases or decreases based on the good's price.
Demand
The desire for a particular good or service coupled with the ability and willingness to pay for it.
Substitutes
Goods or services that can be used in place of each other where the presence of one reduces the demand for the other.
Supply
The total amount of a product or service that is available to consumers in the market at current prices.
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