Which of these animals has the greatest proportion of long-looped nephrons in their kidneys?
A) A saltwater fish
B) A freshwater fish
C) A freshwater mammal, such as a beaver
D) A human
E) A desert mammal, such as a sand rat
E
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Viruses are not yet considered an organism because they don't have cell membranes, organelles, and do not carry out vital life functions, although they do have a form of DNA (or similar RNA). A researcher proposing to categorize viruses in the tree of life would need to
A. establish any virus as a control group for experimentation with established domains of organisms. B. apply his/her proposal to any newly discovered virus, since others aren't currently considered organisms. C. remember that the scientific method will prevent any changes to the current taxonomy and tree of life. D. propose that relationship to other organisms as a new hypothesis, and test viruses for shared life characteristics. E. show the importance of genetic information as a characteristic of life.
Because oxygen is more electronegative than hydrogen, the water molecule is:
A. ionic. B. hydrophilic. C. hydrophobic. D. nonpolar. E. polar.
The transmission of enteric hepatitis is most effectively prevented by
A) safe sex practices. B) immunization. C) reducing aerosol dispersion. D) vector control. E) good public sanitation and personal hygiene.
In studies of two species of barnacles in the marine intertidal zone, it was observed that Chthamalus can live in the upper intertidal zone and the lower intertidal zone if Semibalanus is absent, and Semibalanus can only live in the lower zone because it is more subject to dehydration. Based on this, which of the following statements are true? (Check all that apply.)A) The realized niches of the two species differ.B) The fundamental niche of Chthamalus is larger than its realized niche.C) The fundamental niche of Chthamalus is larger than the fundamental niche of Semibalanus.D) The fundamental and the realized niches of Chthamalus are the same.E) The fundamental and the realized niches of Semibalanus are the same.
What will be an ideal response?