Your question is rather unclear but from what I can tell either there were not an even amount of Petri dishes or some of them were left open while others were not.
Answer:
The process that does not require oxygen is fermentation.
Explanation:
Fermentation is an alternative route of cellular respiration for obtaining energy, in the absence of oxygen. In aerobic respiration, oxygen is the acceptor of electrons from NADH but, in anaerobic respiration, the electron acceptor is an organic compound.
The fermentation process does not occur in the mitochondria nor does it involve the electron transport chain, and has a low energy yield at the end of the process.
With respect to the other options:
- <em>The </em><em><u>electron transport chain</u></em><em> and the </em><em><u>Krebs cycle</u></em><em> occur in the presence of oxygen.</em>
Answer:
The Earth is rotating
Explanation:
The Earth is rotating on it's axis
If the concentration of sodium outside the cell is more than inside , so to take out the sodium , ATP is used as the cells has to work against concentration gradient !
You can see this in Neurons as a example ! There is sodium pump to throw sodium out of cell !!
<h2>
Answer: Plant Cell</h2>
Explanation:
A plant cell is the only cell that has all these characteristics. The box-like structure is due to the cell wall, the large central vacuole which helps with the rigidity of the cell, and chloroplast which contains chlorophyll for photosynthesis.
