BIOL 133APUS BIOL133 Exam 4- Chapters 16-20.docx

APUS BIOL133 Exam 4- Chapters 16-20


Question 1 of 40
2.5/ 2.5 Points
Which individuals in a population are most important in determining the numbers for the Hardy-
Weinberg principle since one can tell their genotype from their phenotype?





A. mutated



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B. fittest



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C. homozygous recessive





D. homozygous dominant





E. heterozygous




Feedback:Correct
Question 2 of 40
2.5/ 2.5 Points
Gradual speciation is more likely to be associated with small changes building up in





,APUS BIOL133 Exam 4- Chapters 16-20



A. geographically diverse areas





B. genes associated with DNA synthesis





C. ability to reproduce asexually





D. stable environments




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Question 3 of 40
2.5/ 2.5 Points
The accumulation of mutations in a population over generations leads to





A. evolution





B. nonrandom mating





C. extinction

, APUS BIOL133 Exam 4- Chapters 16-20






D. decreased variability




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Question 4 of 40
2.5/ 2.5 Points
Proteins that respond to environmental stimuli to prevent the binding of transcription factors are
known as _________.





A. termination factors





B. initiation factors





C. activators





D. repressors




Feedback:Learning Objective: Explain how enhancers and repressors regulate gene expression
Question 5 of 40
2.5/ 2.5 Points
What would be at the base of the evolutionary tree of life?