One student group hypothesized that the dry baker's yeast must be alive. the temperature change, odor, and bubble formation, they said, indicated which characteristic of life? a) be made of one or more cells b) detect and respond to select external stimuli c) have some form of nucleic acid as the hereditary molecule d) show growth and development; that is, specialization of cells or structures

The correct answer is option B, that is, detect and respond to select external stimuli.

Explanation:

The changing odor, temperature, and formation of bubble all suggest that the yeast is reacting towards the external stimuli. This is a feature of all living species. They will react towards the modifications taking place in their surroundings. The modifications that take place here as a consequence of the yeast utilizing the yeast in the dough in order to carry out the process of respiration.

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