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Multiple Choice
Which statement regarding genes and evolution is true?
A
Genes mutate randomly, and beneficial mutations are selected for by natural selection.
B
Genes are intentionally altered by organisms to adapt to their environment.
C
Natural selection creates new genes to improve species survival.
D
All mutations in genes lead to evolutionary advantages.
Verified step by step guidance
1
Understand the concept of mutations: Mutations are changes in the DNA sequence of a gene. They occur randomly and can be caused by various factors such as errors during DNA replication or exposure to certain environmental factors.
Learn about natural selection: Natural selection is a process where organisms with traits that are better suited to their environment tend to survive and reproduce more than those without such traits. This leads to the traits becoming more common in the population over generations.
Recognize the role of beneficial mutations: Not all mutations are beneficial. However, when a mutation provides an advantage in a given environment, it can be selected for by natural selection, leading to an increased frequency of the beneficial trait in the population.
Clarify misconceptions: Organisms do not intentionally alter their genes to adapt to their environment. Mutations occur randomly, and it is the process of natural selection that determines which mutations are advantageous.
Understand the limitations of mutations: Not all mutations lead to evolutionary advantages. Many mutations are neutral or even harmful, and only a small fraction may provide a benefit that can be acted upon by natural selection.