Question

question 18 of 20 : select the best answer for the question. 18. plants have many different hormones that influence their growth, development, and life cycle. for example, a cluster of over-ripe bananas on the counter can cause a newer apple to begin to ripen more quickly and go bad. which hormone below is found in many fruits and can become airborne and cause over-ripening and abscission? a. cytokin b. abscisic acid c. ethylene d. auxin mark for review (will be highlighted on the review page)

Explanation:

To solve this, we analyze each option:

• Option A: Cytokinins promote cell division and growth, not over - ripening or abscission.
• Option B: Abscisic acid is involved in stress responses and dormancy, not fruit ripening.
• Option C: Ethylene is a gaseous hormone produced by many fruits. It is airborne and causes over - ripening and abscission (the shedding of plant parts like fruits). The example of over - ripe bananas causing apples to ripen faster is due to ethylene.
• Option D: Auxins are involved in cell elongation, apical dominance, etc., not fruit ripening.

Answer:

C. Ethylene