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Yeast - Life Cycle

yeasts conditions budding carbon

Yeasts secrete enzymes that break down carbohydrates (through fermentation) to yield carbon dioxide and alcohol. The source of carbohydrates are either living hosts or non-living hosts such as rotting vegetation, or the moist body cavities of animals. Yeasts are considered by some scientists to be closely related to the algae, lacking only in photosynthetic capability—perhaps as a result of an evolutionary trend toward a lifestyle dependent upon host nutrition. Ecologically yeasts are decomposers that secrete enzymes which dismantle the complex carbon compounds of plant cell walls and animal tissues, which they convert to sugars for their own growth and sustenance. Yeast reproduction may involve sexual spore production or asexual budding, dependent upon surrounding conditions. Though yeasts are highly tolerant of environmental variations in temperature and acidity, they thrive in warm and moist places high in oxygen and low in carbon dioxide. Whether or not they reproduce through asexual budding depends on the favorability of surrounding conditions: when times are good, yeast clones are produced by budding. In times of environmental stress, yeasts produce spores which are capable of withstanding periods of environmental hardship—perhaps even to lie dormant, until conditions improve and the mingling of genes can take place with the spore of another yeast. This rare version of yeast reproduction provides for genetic Yeast (Anthrocobia muelleri). Carolina Biological Supply./Phototake NYC. Reproduced by permission.
variation when conditions demand it, though budding is the predominant mode of yeast reproduction.


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over 7 years ago

huh?!? this is very confusing and should be put into simpler words...plzzzzz!!

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over 3 years ago

write other detail about it

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over 6 years ago

I had no idea what you were talking about. and what kind of people look up yeast reproduction? Honestly...

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over 3 years ago

very good material. i realy like this.thankzzzz

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over 3 years ago

good site I like the information, it was a little confusing for me though.

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over 3 years ago

How yeast decomposes plant and animal tissues? Is yeast contains cellulase for decomposition of plant cell wall? Give some explaination on it.

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almost 6 years ago

thank you save my laboratory report

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about 6 years ago

Very elaborated and concise. It helped me a lot in my lab report!

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over 6 years ago

Great piece of information!

you've helped me out with my Biology lab report

thanks a bunch*

xoxo

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about 7 years ago

This is all laid out so clearly. It is concise and thorough. I found that it answered my question and then allowed very convenient links that really helped me understand how the yeasts reproductive habits sustain it's existence.

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over 6 years ago

Hey the information given is nice and very simle to understand. I have one problem. I want to know at what time yeast goes/attain log phase?

Plz guide me

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about 7 years ago

This explanation is great. I needed to understand the life cycle of yeast and now I get it. Thank you.