A trait that is expressed as a continuum rather than as a few discrete phenotypes is

A. polygenic.
B. sex-linked.
C. codominant.
D. Mendelian.
E. either polygenic or codominant.


C. codominant.

Biology & Microbiology

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Which of the following levels of organization are correctly arranged from smallest to largest?

a. tissue, organ, organ system b. tissue, organ system, organ c. organ system, organ, tissue d. organ system, tissue, organ e. organ, organ system, tissue

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Courtship displays are a response to evolutionary pressure caused by

1.balanced polymorphism 2.heterozygote advantage 3.genetic bottlenecks 4.sexual selection

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Water-soluble vitamins differ from fat-soluble vitamins in that water-soluble vitamins are:

A) less readily absorbed from the GI tract B) stored in fat tissue C) stored for a brief period of time D) rarely required as daily supplements to the diet E) not excreted in urine

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Brucellosis is

A) All of these choices are correct B) A zoonosis C) Associated with pathogen in the blood. D) Seen in the patient as a fluctuating fever, with headache, muscle pain, and weakness. E) An occupational illness of people that work with animals.

Biology & Microbiology