
Concept explainers
Concept introduction: Fossils are remains of once living organisms that are preserved throughout the various geological changes on earth through the course of time which is obtained as a partial remain impression or trace.

Answer to Problem 1SQ
Correct answer: The fossil record documents the history of life, provides examples of the evolution of major new groups of organisms and is not complete. Therefore, option d. is correct.
Explanation of Solution
Reasons for the correct statement:
The fossils remains are organisms that lived several years ago. This helps to document the life forms that existed in ancient times. Organisms that existed several years ago and went extinct can be documented only with the help of fossils. They give examples and are models for the animals that existed during that period. Fossil records are rarely obtained completely due to geological changes that occur in the earth during the course of time.
Option d. is given as “all of the above”
As, The fossil record documents the history of life, provides examples of the evolution of major new groups of organisms and is not complete, option d. is correct.
Reasons for the incorrect statements:
Option a. is given as “documents the history of life”.
The fossil record provides examples of the evolution of major new groups of organisms and is not complete. Not documents the history of life alone. So option a. is incorrect.
Option b. is given as “preventing the iris from changing the diameter of the pupil”.
The fossil record documents the history of life and is not complete. Not provides examples of the evolution of major new groups of organisms alone. So option b. is incorrect.
Option c. is given as “all the above”.
The fossil record documents the history of life and provides examples of the evolution of major new groups of organisms. Not incomplete alone. So option c. is incorrect.
Hence, options a., b., and c. are incorrect.
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Chapter 16 Solutions
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