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During Retinal Differentiation,the Various Cell Types Differentiate in Sequence

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During retinal differentiation,the various cell types differentiate in sequence.Which cell type is the last to be born?


Definitions:

Positive Externality

A benefit that is enjoyed by a third-party as a result of an economic transaction.

Negative Externalities

Unintended adverse effects of an economic activity on unrelated third parties; they represent a failure of the market to fully account for the impacts of transactions.

Social Planner

A hypothetical figure in economic theories who makes decisions designed to allocate resources efficiently and achieve social welfare objectives.

Private Cost

The expenses that a company or an individual incurs as a result of its economic activity, excluding any external costs.

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