The condition in which shoot apical meristems suppress the growth of axillary buds is called:

Question

BlackTom AI · Accepted Answer

To tackle this question, I will evaluate each option in turn and explain the underlying concept behind why it fits or does not fit the definition.
Option a: primary growth. This term refers to the lengthening of a plant’s shoots and roots, driven by the apical meristem, i.e., vertical growth rather than the regulatory interaction between apical and axillary buds. It does not describe the suppression of axillary bud growth, so this choice is inaccurate in the given context.
Option b: apical dominance. This is the classic term for the phenomenon where the shoot apex inhibits the growth of lateral or axillary buds, often through hormonal signals like auxin. This suppression ensures the main stem grows longer before lateral branches develop, matching the description in the question.
Option c: repression. While “repression” can describe inhibitory effects in a general sense, it is not the standard botanical term used for the specific suppression of axillary buds by the shoot apex. The question seeks the established term, which is apical dominance, making this choice too vague and imprecise.
Option d: optimum growth pattern. This phrase is a broad descriptor and does not denote the specific regulatory interaction between apical meristems and axillary buds. It does not capture the mechanism or the standard terminology used in plant physiology, so it is not correct.
In summary, the scenario described corresponds to the well-known phenomenon where the apical meristem suppresses axillary bud outgrowth, which is most precisely named apical dominance. The other options either describe different growth concepts or use non-specific terms, hence they do not fit the definition."

BIO1022 CL S2 2025 On Campus Test 2

The condition in which shoot apical meristems suppress the growth of axillary buds is called:

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