Which Hormone Promotes Stem Elongation and Was First Discovered While

question 54

Multiple Choice

Which hormone promotes stem elongation and was first discovered while studying the growth of extremely tall and spindly rice plants?

• A) abscisic acid
• B) auxin
• C) cytokinin
• D) ethylene
• E) gibberellin

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Definitions:

Fetal Period

The stage of human development inside the womb from the end of the embryonic stage (approximately 9 weeks after conception) to birth.

Cross-Sectional

This type of study examines data from a population, or a representative subset, at one specific point in time.

Longitudinal Studies

Research methods that involve repeated observations of the same variables or groups over a long period of time, often used to study development or changes.

Cohort Effects

Variations in the characteristics of an area of study (like attitudes, abilities) due to the study subjects having shared a particular experience during a specific time frame.