The mouse is a particularly useful model for studying human disease because _____
a. mice and humans are 100% genetically identical
b. all mice are in essence, clones
c. mice do not feel pain and discomfort
d. mice and humans are the only species whose genomes have been sequenced
e. approximately 90% of human disease-associated genes are present in the mouse genome
e
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Water
A. is nonpolar. B. has a low heat of vaporization. C. has cohesive properties. D. evaporates and increases body temperature. E. is a relatively poor solvent.
Today's atmosphere on Earth is made up of nitrogen, oxygen, carbon dioxide, and water. According to all models, which of these was largely absent 3.8 billion years ago?
A) oxygen B) nitrogen C) carbon dioxide D) water
During which phase of the cell cycle is DNA synthesized?
A. S B. G2 C. metaphase D. G1 E. prophase
Which statement about fungi and plant disease is most accurate?
A) About equal numbers of plant diseases are caused by fungi and bacteria. B) Far more plant diseases are caused by fungi than bacteria. C) Viruses cause more plant diseases than fungi. D) Fungi rarely cause diseases.