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Korolek [52]
3 years ago
7

think about a petal plucked from its flower. is the petal alive according to the characteristics of life? why or why not?

Biology
2 answers:
Eva8 [605]3 years ago
8 0
I would say No, because the flower petal on it's own can not Grow, or Reproduce, Adapt to it's Environment, Use Energy, or Respond to it's Environment.
Anna [14]3 years ago
7 0

Answer;

No, the petal is not alive according to the characteristics of life

Explanation;

-This is because the flower petal on it's own can not Grow, or Reproduce, Adapt to it's Environment, Use Energy, or Respond to it's Environment.

-Growth, reproduction, response, and respiration are some of the characteristics of living organisms, therefore for anything to be considered living it must possess these characteristics.

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The yeast, as well as some bacteria, use the glucose molecule through "glycolysis"  to obtain a 3-carbon molecule called pyruvates. Glycolysis consists of 10 coupled reactions, in the end, from one glucose (6 carbons) the yeast will obtain two pyruvates (3 carbons each).

Pyruvate can follow three main routes to obtain ATP, end up as lactate, as carbon dioxide (CO2) and water or as ethanol (alcohol) and CO2. Regarding yeast, it can only be used to obtain Ethanol plus CO2 or to obtain CO2 plus water.

The path that follows from here depends on the reaction medium. The cell gets much more energy (38 molecules of ATP) by converting pyruvate into water + CO2 than by turning it into ethanol + CO2 (2 molecules of ATP). Then, whenever possible, the yeast will follow the CO2 + water path. To support this route the cell needs oxygen.  In this case, the cell obtains its energy by breathing when there is no oxygen available, the yeast has a way that allows it to gain much less energy but allows it to survive, the alcoholic fermentation, previously mentioned.

Therefore, A, B, and D answers are wrong for the reasons mentioned above.


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