Biology, 17.04.2020 17:08, davelopez979
A spectrophotometer measures turbidity, but this measurement can be used to estimate cell number if you first generate a standard curve that relates CFU per ml culture (on the y-axis) to optical density (on the x-axis) across a range of cell concentrations for your culture. This method generally works well, but there can be some problems. If you were using this standard curve approach, which of the following would cause you to mis-estimate the number of CFU per ml in a culture from a measurement of optical density.
a. the culture increases in density from one measurement to the next
b. the culture produces a dark brown pigment under certain conditions
c. the cells in the culture start clumping together
d. the culture decreases in density from one measurement to the next
e. the culture stops growing
Answers: 2
Biology, 22.06.2019 02:50, alannalizettep8trnj
How does upwelling affect coastal fisheries? upwelling damages nutrient supplies at coastal fisheries as the warm, nutrient-rich surface water is replaced by nutrient-poor, cold water. upwelling damages nutrient supplies at coastal fisheries as the cold, nutrient-rich surface water is replaced by nutrient-poor, warm water. upwelling improves the nutrient supply at coastal fisheries as the warm, nutrient-rich surface water replaces the nutrient-poor, cold water. upwelling improves the nutrient supply at coastal fisheries as cold, nutrient-rich water replaces the warm, nutrient-poor surface water.
Answers: 3
Biology, 22.06.2019 03:30, codycoker4200
What does the hardy-weinberg principle relate to? a. chances of survival of an organism b. frequency of alleles in a population c. natural selection in a species d. causes of evolution among organisms
Answers: 1
Biology, 22.06.2019 03:30, caliharris123
What is the correct answer for the process of water eroding soil? rills, sheet erosion, gullies sheet erosion, rill, gullies gullies, rills, sheet erosion sheet erosion, gullies, rills
Answers: 1
A spectrophotometer measures turbidity, but this measurement can be used to estimate cell number if...
Spanish, 10.09.2019 17:30
Physics, 10.09.2019 17:30