Which of the following is a family of six-pointed, star-shaped viruses that cause gastrointestinal diseases?
A) Picornaviridae
B) Caliciviridae
C) Rhabdoviridae
D) Coronaviridae
E) Filoviridae
B
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The evolution of saber teeth in a number of groups of extinct carnivorous mammals is an example of
A. homoplasy caused by convergence. B. homoplasy caused by common descent. C. homoplasy caused by evolutionary reversal. D. homology caused by convergence. E. homology caused by common descent.
Removal of Giardia intestinalis from municipal water supplies involves the use of ________.
A. rapid sand filters B. gamma radiation C. predatory microorganisms D. slow sand filters
The inferior vena cava moves blood from the ____
a. head only b. forelimbs only c. head and forelimbs d. abdominal organs only e. abdominal organs and hind limbs
Current analysis indicates that less than 2% of the human genome codes for proteins
Based on the systems approach employed by the ENCODE project, what percentage of the genome is estimated to contain functional elements (includes functional RNAs and regulatory sequences)? A) Less than 2% B) About 50% C) At least 80% D) 100%