
Concept explainers
To determine:
The differences between mutagens that are environmental and mutations that are not directed by the environment.
Introduction:
The mutations are the random changes occurring in the structure of DNA (deoxyribonucleic acid). The mutations lead to the change in genotype and may also change the

Explanation of Solution
The agents that have the potential to cause permanent changes in the genetic structure of an organism are called mutagens. The mutants can be physical, chemical, or biological. The chances of occurrence of mutations increase by equal to or more than hundred due to the mutagens. The mutagens those are environmental are ionizing radiation, various chemicals, and many microbial organisms.
The mutations are the sudden events occurring in nature without the direction of the environment. The mutation does not occur for the need of an organism that will be helpful for their survival in the environment. The mutations can be harmful or neutral to organisms. Sometimes the mutations can be positive for the organisms that will be passed on to the further generations.
The mutations are not driven by the environment, they occur randomly. The rate of mutations is increased by the environmental mutagens.
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Chapter 14 Solutions
BIOLOGY:HOW...ACCESS-W/FLYER (48 MO.)
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