Imagine That You Are a Graduate Student Seeking an Idea

question 74

Multiple Choice

Imagine that you are a graduate student seeking an idea for a research project that will help us understand the evolution of a parasitic lifestyle from a free-living lifestyle. Which of the following outcomes would you expect if you compare the genes of parasitic species to relatives that are free living?

• A) The parasitic species will have fewer functioning genes than the free-living species because loss of many genes will not be harmful.
• B) The free-living species will have more functioning genes because they evolved new traits.
• C) The genes will have changed in base sequence, but the number of functioning genes in parasitic and free-living species will be the same.
• D) More genes for sensing the environment will have evolved in the parasitic species as compared to the free-living species.

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