How Many People Would Be Needed to Accumulate 900 Person-Years

question 2

Essay

How many people would be needed to accumulate 900 person-years of observation in each row?
Number of people Average time at risk per person
__________ 1 year
__________ 2 years
__________ 3 years
__________ 10 years

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Definitions:

Embryonic Development

The process by which the embryo is formed and develops, beginning with fertilization and ending at birth or hatching.

Organogenesis

The process of organ formation.

Blastula

An early stage of embryonic development in animals, characterized by a spherical layer of cells (the blastoderm) surrounding a fluid-filled cavity (the blastocoel).

Embryonic Development

The process by which an embryo forms and develops, involving cell division, migration, and differentiation to establish the basic plan of an organism.