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3. Based on the graph below, which is true about how root growth affected by auxin concentrations?

3. Based on the graph below, which is true about how root growth affected by auxin concentrations?

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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3. Based on the graph below, which is true about how root growth is affected by auxin concentrations? **Graph Explanation:** The graph is titled "Effects of Hormone Concentration on Plant Growth" and depicts the growth response of stems and roots to varying concentrations of auxin, measured in particles per liter. - The x-axis represents the "Increasing Auxin Concentration (particles/L)" on a logarithmic scale ranging from \(10^{-1}\) to \(10^{11}\). - The y-axis indicates the growth effect, with "promotes" at the top and "inhibits" at the bottom. Two curves are shown: - The blue curve represents the growth response of "Roots." - The red curve represents the growth response of "Stems." **Curve Descriptions:** - *Roots (Blue Curve):* - At low auxin concentrations, root growth is promoted. - As auxin concentration increases, root growth is inhibited, showing a downward trend. - *Stems (Red Curve):* - At low auxin concentrations, there is minimal stem growth. - As auxin concentration increases, stem growth is greatly promoted, showing an upward curve. **Options:** A) Root growth slows down as auxin concentrations get higher B) Roots are growing at their highest rate as auxin concentrations get higher C) Root growth causes auxin concentrations to decrease
Transcribed Image Text:3. Based on the graph below, which is true about how root growth is affected by auxin concentrations? **Graph Explanation:** The graph is titled "Effects of Hormone Concentration on Plant Growth" and depicts the growth response of stems and roots to varying concentrations of auxin, measured in particles per liter. - The x-axis represents the "Increasing Auxin Concentration (particles/L)" on a logarithmic scale ranging from \(10^{-1}\) to \(10^{11}\). - The y-axis indicates the growth effect, with "promotes" at the top and "inhibits" at the bottom. Two curves are shown: - The blue curve represents the growth response of "Roots." - The red curve represents the growth response of "Stems." **Curve Descriptions:** - *Roots (Blue Curve):* - At low auxin concentrations, root growth is promoted. - As auxin concentration increases, root growth is inhibited, showing a downward trend. - *Stems (Red Curve):* - At low auxin concentrations, there is minimal stem growth. - As auxin concentration increases, stem growth is greatly promoted, showing an upward curve. **Options:** A) Root growth slows down as auxin concentrations get higher B) Roots are growing at their highest rate as auxin concentrations get higher C) Root growth causes auxin concentrations to decrease
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