A population that is increasing in size has an intrinsic rate of population growth (r) that is
A) < 0.
B) = 0.
C) > 0.
D) > 1.
C
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Poly-?-hydroxybutyric acid (PHB) is a carbon- and energy-storing polymer
Indicate whether the statement is true or false.
Early classification systems of the bacteria employed all of the following characteristics except
A. the ability to photosynthesize. B. rRNA sequences. C. motility. D. colony or filament forming. E. sporulation or binary fission.
Match the term on the left with its definition or description on the right
A) light-dependent generation of NADPH B) electron donors such as sulfide and thiosulfate C) electron donor is water D) energy from sunlight, carbon from organic sources E) energy from carbon, carbon from sunlight F) electron donor is carbon dioxide G) energy from sunlight, carbon from CO2 1) photoreduction 2) photoheterotrophs 3) photoautotrophs 4) oxygenic phototrophs 5) anoxygenic phototrophs
Which of the following is an organic growth factor?
A) glucose B) vitamin B1 C) peptone D) Mg+2 E) H2O