Afalcultative anaerobic organism is able to perform aerobic respiration in the presence of oxygen and fermentation in the absence
of oxygen. an example of a falcultative anaerobic organism is brewer's yeast, which is used in the production of alcoholic
beverages. if sealed in a vessel containing oxygen gas, water, and sugar (glucose), the yeast will eventually deplete the oxygen
gas. as long as glucose is available, however, the yeast can still survive.
brewer's yeast use oxygen preferentially

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telophase and anaphase

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

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there is not 1 highest source of protein, but there are many; meats, fish, poultry, seafood, cheese, eggs, yogurt and milk. the only non complete animal food that is beneficial is gelatin.

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