Campbell Essential Biology with Physiology (5th Edition)
5th Edition
ISBN: 9780321967671
Author: Eric J. Simon, Jean L. Dickey, Jane B. Reece, Kelly A. Hogan
Publisher: PEARSON
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Chapter 15, Problem 12PS
Summary Introduction
To complete: The table below to show how the bacterial population increases.
Introduction: Bacterium is a prokaryotic organism that copies their DNA and divide by binary fission. In binary division, a single cell becomes two cells, which then becomes four cells, eight cells, and so on.
Summary Introduction
To explain: The reason that the rate of increase changes over time and how the graph of data look.
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Complete Table 1by doubling the number of bacteria (Clostridium sp.) and diatoms (Chaetoceros sp.) every 30 minutes and 60 minutes, respectively, and by writing the log10 of this number in the appropriate columns with the results , Draw a graph showing the growth (N) of the populations of both species from time = 0 (also written as t0) to time = 310 (t310) minutes. Draw both populations on the same graph. NB: It will be necessary to plot Chaetoceros sp. on a second y-axis. Label the axes and provide a suitable legends.
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Consider two species of bacteria A and B with the same initial population. The species grow exponentially with growth rate
rA = 0.05 for species A and rg =
-0.025 for species B. Will the two species of bacteria ever have the same size?
Type your answer here
(Enter YES or NO)
The time at which they reach the same size is t =
Type your answer here
(Enter -1000 if their size is never equal)
What is the generation time (in minutes) of a bacterial population that increases from 10,000 cells to 10,000,000 cells in fours hours of growth? Show computation.
Chapter 15 Solutions
Campbell Essential Biology with Physiology (5th Edition)
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- Draw a graph that shows the potential population growth of a bacterial population that starts with 500 cells. Assume binary fission, a generation time of 30 minutes and reproduction for four (4) generations.arrow_forwardThe number of bacteria in a culture every 2 hours and 30 minutes. If the initial number of Bacteria present was 1.2 × 10³, how many bacteria will there be after 10 hours?arrow_forwardquick answers to mc pleasearrow_forward
- Calculate the generation time in a growth experiment in which a medium was inoculated with 5 X 106 cells/mL of E. coli cells and following a 1 hour lag, grew exponentially for 5 hours, after which the population was 5.4 X 109cells/mLarrow_forwardIf it takes 2 hours for a population of bacteria to grow from 100 cells to 1600 cells, what is the generation time of this bacterial species? 15 minutes 20 minutes 30 minutes 40 minutesarrow_forwardHow can I solve this equation?arrow_forward
- Bacteria count Shown is a typical graph of the number N of bacteria grown in a batch culture as a function of time 1. Describe what you think is happening during each of the four phases. NAarrow_forwardIt's the same answer choices all the way down. (This is not a graded thing, this is a practice ONLY)arrow_forwardCould you please assist with correct number?arrow_forward
- If you start out population density of 300 cfu/ml of a bacterium that divides every 20 minutes,what will be the population density after five generations assuming the cells are in the log phase of growth?arrow_forwardprovide answer with explanation dont copy give asaparrow_forwardGive typed full explanation not a single word hand written otherwise leave itarrow_forward
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