The roots of about 10% of all kinds of plants are involved in symbiotic associations with certain kinds of fungi.
Answer the following statement true (T) or false (F)
False
The roots of 80% of the plants are involved with fungi.
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Antimicrobials that inhibit the growth of microorganisms have the suffix
A. -cidal. B. -static. C. -anti. D. -genic.
In prokaryotes, an _____ is a group of gene that are regulated together.
Fill in the blank(s) with the appropriate word(s).
Nonencapsulated bacterial cells appear ______ in a properly prepared capsular stain.
A) Purple B) Gray C) Clear
During normal climatic conditions with regular rainfall, the average beak depth for a population of finches was 6.8mm. Researchers found that after a drought, average beak depth increased to 8.8mm. Birds with deep beaks (>9mm) were better able to eat large, hard seeds. Small hard seeds were also available after the drought, but could only be eaten by birds with shallow beaks (<7mm). Choose the graphical representation and term that best represents what would happen in the post-drought finch population if both types of seeds continue to be available.
A. 
balancing selection.
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B. 
stabilizing selection.
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C. 
negative frequency-dependent selection.
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D. 
disruptive (diversifying) selection.
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E. 
directional selection.
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