Biology
Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 37.3, Problem 3CC
Summary Introduction

To determine: The environmental signal used by roots to achieve downward growth.

Introduction: An organism’s response to an external or an internal stimulus is known as its behavior. Plant movement is one of the examples of plant behaviour. Chemical signals which are transported within the body of a plant are known as plant hormones and these assist the plant in responding to the external stimuli. Gravitropism and phototropism are two types of plant movement in which the plant responds to the external sources of light.

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Is there any other environmental signal that roots could use to achieve downward growth?
why is pressure higher in parts of the phloem Where sugar is being loaded than in parts were sugars been removed?
Why root pressure is seen only under favorable conditions,like spring and rainy season?
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