Yeast is a facultative anaerobe. This means that alcohol fermentation takes place only if:

1 the temperature is close to 37°C
2 the atmosphere does not contain oxygen
3 sugar is provided to the cells
4 light is provided to the cells

2 the atmosphere does not contain oxygen

Explanation:

The yeast is a faculties anaerobe in that in the absence of oxygen, it is able to alter its metabolism for growth using alcoholic fermentation and also experience better growth in the presence of oxygen. They can grow both in the presence and absence of oxygen

false because ozone (o3) depletion does not cause global warming, but both of these environmental problems have a common cause: human activities that release pollutants into the atmosphere altering it.

global warming is caused primarily by putting too much carbon dioxide into the atmosphere when coal, oil, and natural gas are burned to generate electricity or to run our cars.

explanation:

clumped distribution, because you'de have all of the population gathered in a relatively small are.

it's the most common because it provides protection and a mate for reproduction

example: humans, seeweed, cattles, etc.