Skill: Modeling the growth curve using a simple organism such as yeast
Modeling organism:Saccharomyces cerevisiae (means “the sugar fungus of the beer”)
Yeasts belong to the fungi kingdom • Unicellular• Cell wall (chitin not cellulose)• Normal reproduction: asexual (budding)
Metabolism• Anaerobic (does not need oxygen)• Breaks down glucose for energy• Byproducts: carbon dioxide & ethyl alcohol
Societal Uses• Food (baking, brewing)• Genetics Research• Biotechnology • Bioremediate toxic pollutants (arsenic)
"20100911 232323 Yeast Live" by Bob Blaylock - Own work. Licensed under CC BY-SA 3.0 via Wikimedia Commons - http://commons.wikimedia.org/wiki/File:20100911_232323_Yeast_Live.jpg#/media/File:20100911_232323_Yeast_Live.jpg
#2: The exponential growth pattern occurs in an ideal, unlimited environment#3: Population growth slows as a population reaches the carrying capacity of the environment.
Allott pg 645
Application: Evaluating the methods used to estimate the size of commercial stock of marine resources.Application: Analysis of the effect of population size, age, and reproductive status on sustainable fishing practices
Allott p 645
SAS: Analyzing Commercial Fishing Catches
https://www.sascurriculumpathways.com/portal/Launch?id=1555
#4 The phases shown in the sigmoid curve can be explained by relative rates of natality, mortality, immigration, and emigration
Allott p 646, 647
#5: Limiting factors can be top-down or bottom-up
Application: Bottom-up control of algal blooms by shortage of nutrients & top-down by herbivory
Allott p 648
Skills: Modelling the growth curve using a simple organism such as yeast or species of Lemna
Allott p 647
Sources
Content Allott, Andrew, and David Mindorff. Biology: Course Companion. 2014 ed. Oxford: Oxford UP, 2014. Print. Oxford IB Diploma Programme.
Hebrank, Mary. Teach Engineering. 2013. Regents of the University of Colorado. https://www.teachengineering.org/view_lesson.php?url=collection/duk_/lessons/duk_cellresp_mary_less/duk_cellresp_mary_less.xml
Walpole, Brenda. Biology for the IB Diploma. 2nd ed. Cambridge: Cambridge UP, 2014. Print.
ImagesUnless otherwise noted, images are obtained from Pixabay (www.pixabay.com) and used under the CC0 Public Domain license.