BIOLOGY  VOL. II
BIOLOGY VOL. II
16th Edition
ISBN: 9781308795317
Author: Raven
Publisher: Mcgraw-Hill/Create
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Chapter 41, Problem 1S
Summary Introduction

To explain:

The failure of flowering of the poinsettias, which are produced in the greenhouse near the highway.

Introduction:

The plants use photo periodism for detecting the favorable conditions for flowering of the plants. The plants are divided into short day plants and long day plants. The short day plants are long night dependent plants and long day plants are short night dependent plants.

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