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Question 40

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Use the following to answer questions :
There are two species of microbes,A and B,which can be grown together or separately.If GA is the per capita growth rate of species A,GB is the per capita growth rate of species B,DA is the density of species A,and DB is the density of species B,the per capita growth rates for each are:
GA = 0.14 - 0.006 DA - 0.04 DB
GB = 0.05 - 0.008 DB + 0.009 DA
-If the density of A is 10 and the density of B is 6,the growth rate(s) of


A) A and B are both positive.
B) A is positive and of B is zero.
C) A is positive and of B is negative.
D) A is negative and of B is positive.
E) A and B are both negative.

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