Materials

■ safety goggles

■ disposable gloves

■ labeling tape

■ potting-soil mixture

■ 10 bean seedlings, at least 3 cm tall

■ centimeter ruler

■ gibberellic acid solution (contains a gibberellin)

Background

1. Gibberellins are found in all parts of plants but are most concentrated in immature seeds. Gibberellins are only one of many kinds of hormones that affect plant functions.

2. What is the major effect of gibberellins on plant tissues?

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