Biology
11th Edition
ISBN: 9781259188138
Author: Peter H Raven, George B Johnson Professor, Kenneth A. Mason Dr. Ph.D., Jonathan Losos Dr., Susan Singer
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 34, Problem 1U
In the
a. Reproduction
b. Digestion
c. Locomotion
d. Osmoregulation
Expert Solution & Answer
Summary Introduction
Introduction:
Flatworms are free-living organisms, which are present in a wide variety of marine, fresh waste, and terrestrial habitats. Flatworms are carnivores that depend upon small animals and organic debris. Excretion and osmoregulation are the types of metabolic processes that occur in flatworm by flame cells.
Answer to Problem 1U
Correct answer:
In the flatworm, flame cells are involved in osmoregulation, which is a metabolic process. Therefore, option d. is correct.
Explanation of Solution
Reason for the correct statement:
Flame cells, which are present in the flatworm poses an excretory system. Flame cells contain flagella that cause the movement of water and excretory substances within the tubules. Further, it moves to the pores present between the epidermal cells by which the liquid is thrown out.
Option d. is given as “osmoregulation”.
In the flatworm, metabolic processes such as excretion and osmoregulation occurs and is regulated by the flame cells that are the bulblike structures located on the side branches of the tubules”, which is the right answer.
Hence, option d. is correct.
Reasons for the incorrect statements:
Option a. is given as “Reproduction”.
Reproduction is not a metabolic process and flame cells are not responsible for the reproduction in the flatworms. Therefore, it is a wrong answer.
Option b. is given as “Digestion”.
Flatworm contains a single body, a mouth that is responsible for digestion. Therefore, it is a wrong answer.
Option c. is given as “Locomotion”.
Locomotion or movement is not a type of metabolic processes in flatworms. Therefore, it is a wrong answer.
Hence, options a., b., and c. are incorrect.
Conclusion
Conclusion:
Flame cells are the bulb-like structures that contain flagella with flickering movements defeating inside the cell. These are located across the branches of the tubules.
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