Plant Hormones Can Have Different Effects at Different Concentrations

question 87

Multiple Choice

Plant hormones can have different effects at different concentrations. This explains how

• A) some plants are long-day plants and others are short-day plants.
• B) signal transduction pathways in plants are different from those in animals.
• C) plant genes recognize pathogen genes.
• D) auxin can stimulate cell elongation in apical meristems, yet will inhibit the growth of axillary buds.
• E) gibberellin concentration can both induce and break dormancy.

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Definitions:

Warka Vase

An ancient Sumerian carved alabaster stone vase found in the temple complex of Uruk, depicting early forms of writing and narrative relief sculpture, dating from around 3200 BCE.

Dedicant

A person who dedicates something, particularly in a religious or spiritual context, such as dedicating a temple or oneself to a deity.

Bent-Axis Plan

A plan that incorporates two or more angular changes of direction, characteristic of Sumerian architecture.

City-State

An independent, self-governing city.