Advanced Placement (AP) Biology Practice Exam

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What is the term used to describe hormones produced in plants?

Cytokinins
Phytohormones
Auxins
Giberellins

The correct answer is: Phytohormones

The term used to describe hormones produced in plants is phytohormones. Phytohormones are signaling molecules that regulate various physiological processes in plants, including growth, development, and responses to environmental stimuli. This category encompasses a wide variety of hormones that play specific roles, including auxins, cytokinins, gibberellins, abscisic acid, and ethylene. Auxins, cytokinins, and gibberellins are all specific types of phytohormones, each with unique functions in plant growth and development. For example, auxins are primarily involved in cell elongation and differentiation, while cytokinins promote cell division and shoot development. Gibberellins are known for their role in seed germination and stem elongation. Understanding the broader category of phytohormones is crucial, as it encompasses all plant hormones, allowing for a comprehensive perspective on plant biology and signaling mechanisms.