AP Biologymediummcq1 pt
Over a specified time interval, the net change in the size of a local population is calculated as
A.(births + immigration) − (deaths + emigration)
B.births − deaths only
C.births + deaths
D.carrying capacity minus size
Explanation
Core Concept
Net population change over an interval equals births plus immigration minus deaths plus emigration: ΔN = (B + I) − (D + E). If the interval length is specified, dividing by time gives an absolute rate of population change; dividing additionally by population size produces a per-capita rate. Calling the raw difference alone a 'growth rate' can therefore be ambiguous.
Correct Answer
A(births + immigration) − (deaths + emigration)
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