In the sigmoid growth curve, the number of individuals at any one time is indicated by what symbol? 

A. ri
B. N
C. K
D. dN/dt
E. N/K


B. N

Biology & Microbiology

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Organisms belonging to the genus Legionella are:

a. gram-positive diplococci. b. gram-positive diphtheroid bacilli. c. gram-negative coccobacilli. d. faintly staining, thin gram-negative bacilli.

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Which ecological role is least likely to be performed by bryophytes?

a. enhancing the water-holding capacity of garden soil

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Haplogroups consist of

A) sets of species that share a recent ancestor. B) the set of Y chromosomes in a population. C) groups of SNPs that are linked on a chromosome. D) preserved gametes, which are haploid.

Biology & Microbiology