Biology
Biology
10th Edition
ISBN: 9780073383071
Author: Raven
Publisher: MCGRAW-HILL HIGHER EDUCATION
bartleby

Videos

Textbook Question
Book Icon
Chapter 40, Problem 1U

Which of the following is stimulated by blue light?

a. Seed germination

b. Detection of plant spacing

c. Phototropism

d. Shoot elongation

Expert Solution & Answer
Check Mark
Summary Introduction

Introduction:

The white light consists of the seven colors “violet”, “indigo”, “blue”, “green”, “yellow”, “orange”, and “red”. The blue color of the light has the wavelength equal to 460 nm (nanometer).

Answer to Problem 1U

Correct answer:

The phototropism is stimulated by the blue light. Therefore, option c. is correct.

Explanation of Solution

Reason for the correct statement:

The direction of the feedback of the plant organs either in the direction of the light source or away from the light source is called phototropism. The blue light receptors are present on the plant organs, which direct the phototropism.

Option c. is given as “Phototropism”.

As, “the blue light influences the movement of plant organs, the plant organs in most of the cases show the positively phototropic movement”, it is the right answer.

Hence, option c. is correct.

Reasons for the incorrect statements:

Option a. is given as “Seed germination”.

The seed germination does not require the presence of light, as the seed germinates beneath the soil. So, it is a wrong answer.

Option b. is given as “Detection of plant spacing”.

The detection of the plant spacing is related to the far-red light exposure. This is not related to the blue light stimulation. So, it is a wrong answer.

Option d. is given as “Shoot elongation”.

The elongation of the shoot is regulated by the presence of a pigment, which is blue green in color. So, it is a wrong answer.

Hence, options a., b., and d. are incorrect.

Conclusion

The parts of the plants move positively from the stimulation by the blue light.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
Utilizing the following pedigree, and the key for phenotypes, to the right of it, determine the genotypes of the individuals in the pedigree for blood type inheritance.   Individual       Blood Type I1 I2 II1 II2 II3 II4 III1 III2 III3 III4 III5 III6
a)At what wavelength (nm) on a spectrometer can this color be quantified?                      b) Record your results. Indicate on this page which boxes turned color.                    A B C + - 1:2           1:10           1:100             c) Based on these results, which patient(s) definitely have lupus, which definitely do not, and which require further testing?
a) Which dog breed has the ancestral allele for all three genes, similar to gray wolves?   b)Which dog breeds have a more recent allele for FGF5 but an ancestral allele for KRT71?   c)Which coat type is the ancestral allele of the KRT71 gene associated with?   d)How might understanding the functions of genes in dogs help us better understand human health?
Knowledge Booster
Background pattern image
Biology
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
Biology
ISBN:9781305967359
Author:STARR
Publisher:CENGAGE L
Text book image
Biology (MindTap Course List)
Biology
ISBN:9781337392938
Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher:Cengage Learning
Text book image
Concepts of Biology
Biology
ISBN:9781938168116
Author:Samantha Fowler, Rebecca Roush, James Wise
Publisher:OpenStax College
How do Plants Handle Stress?; Author: Alex Dainis;https://www.youtube.com/watch?v=TYsnveEHqec;License: Standard Youtube License